ZePrA | Spot Color Iteration (ZePrA 9 and higher)

Spot Color Iteration

Iterate spot colors to improve or maintain quality

Iterate Spot Colors

Spot Color Iteration is a process that involves printing of the spot colors converted from ZePrA on the printer to be used for the print job, followed by measuring test charts and optimizing the color differences (expressed in deltaE2000) until the measured deltaE values are within the desired tolerances. Printing the test chart and applying the Iterate Spot Colors feature once only already results in an improved spot color rendering which is usually close to the optimum of this printer.

Why can spot color iteration be required?

First of all, be assured that ZePrA already calculates the best possible spot color conversion based on the target profile set under Configuration/Target Color Space. However, printers, inks and papers drift over time so that there are always some deviations from the state the printer was profiled. During spot color iteration we measure how converted spot colors are actually printed in the current state, and subsequently optimize the deltaE2000 values. The iteration report shows which colors are improved and where restrictions based on the color gamut or the spot color Calculation Method occur so they can’t be optimized further or if additional iteration steps are recommendable.

Procedure

Open the Spot Color Iteration Wizard, either from:

  1. The Spot Colors tab under Configurations (Configurations > Spot Colors > Iterate at the bottom of the window).

  2. The Tools menu (Tools > Spot Color Iteration).

  3. Alternatively, if a job with spot colors has been converted via a queue and the associated configuration is set to Convert Spot Colors, the Spot Color Iteration Wizard can be started by right-clicking on this job in the Processed Jobs section of the Overview window and selecting Spot Color Iteration.

Note: A spot color module license is required to use the tool.

The Spot Color Iteration Wizard dialog consists of two tabs, the Current Iteration and the Archive tabs. The Current Iteration tab contains the actual iteration wizard and typically, if a configuration is selected that has not yet been iterated, the wizard is started directly there. The Archive tab contains all the iteration steps that have been carried out, including all the evaluation details.

The wizard guides the user through the iteration process in seven steps:

Step 1: First, select the Configuration you would like to use for printing. The option Convert Spot Colors must be enabled in this configuration.

Notes: When the Spot Color Iteration Wizard is started via Processed Jobs of the Overview, the Configuration is already preselected.
The best approach for the iteration of spot colors is to set the Calculation Method to Precise Match or Visual Match in the respective Configuration.
The setting Use the least Amount of Channels may be insufficient for iterating spot colors. Importantly, spot color iteration will not work when the spot color conversion is set to Convert using Alternate Color Space from PDF.

Step 2: Select the source of the spot colors you would like to optimize. You can either choose a PDF or Image File with spot colors or an entire spot color Library.

Note: When the Spot Color Iteration Wizard is started via Processed Jobs of the Overview, the Job (PDF or image file) is already preselected.

Step 3: Select one or more spot colors for iteration. All spot colors of the job, PDF or image file will be automatically extracted and displayed. Disable the colors that are not to be iterated. By default all spot colors are preselected.

Step 4: Choose to Create a Test Chart or to measure the full tones of spot colors from an existing print (Don’t create Test Chart).
Create a Test Chart: Creates a test chart with the spot colors selected in the previous step. Select an Instrument Setting and click on Save to enable the Continue button.

Don’t create Test Chart: Some prints contain control patches of spot colors that can be used for measuring. Larger areas in the design that contain the 100% tone of a spot color can also be used.

Note: The test chart contains the converted spot colors as given in the Configuration using the conversion settings and Calculation Method defined in the tab Spot Colors.

Step 5: Measure the printed spot colors. When using the test chart, it must be printed on the printer without any color management and can be measured after drying.
Measure: Starts the Measure Tool. You do not need to worry about the reference file and layout, as this is already preselected within the Measure Tool. Instructions on how to select your device and make measurements can be found under Measure.

Load: If you have created a test chart you can use the associated exported reference file and measure your printed chart with a different measurement tool. Make sure that the measurements are saved in standard file formats that can be read by ZePrA, such as CGATS TXT, XML or CXF3. The external measurement files can be loaded using the Load button.

Once the measurement data has been transmitted from Measure Tool or loaded from external sources, and it conforms to the printed chart which is indicated by a green check mark, you can proceed by clicking Continue.

Note: When loading measurement data that does not match the chart layout or the corresponding patches in the reference file, you are alerted by a warning message and cannot proceed to the next step.

Step 6: The evaluation results of the measurements of each spot color are displayed in comparison to the reference Lab values of the original spot colors. In addition to the DeltaE2000 (dE00) and DeltaE76 values, a Status information text is also displayed, either in green, yellow or orange. The Legend below the table explains the indication colors and status information.

Green: The spot color match is less than 1 dE00 and a perfect match is achieved. Further optimization is then no longer required. 

Yellow: The spot color match is less than 2 dE00 but higher than 1 dE00 and the Status column indicates that the match can further be improved.

Orange:  The spot color has a higher deviation than 2 dE00 and the Status column indicates that the match can further be improved.

If a color is not optimizable or out-of-gamut, it can not be improved which is indicated in the Status information column, too.

ZePrA preselects one of the two options (Apply Optimization or Don’t apply Optimization) depending on the evaluation results. However, the preselection can be overridden and another iteration cycle can be applied if the results are to be improved even further. To do this, select the Apply Optimization radio button and click Continue. Alternatively, if you just need the measurements for evaluation select the Don’t apply Optimization radio button.

Step 7: The concluding step of the iteration cycle contains three options and a checkbox to choose from. Based on the previous results, the wizard already preselects a logical option for you to follow:

  1. Optimize Spot Colors again: Runs another iteration cycle, for example, to check whether a previously iterated spot color successfully passes the evaluation. If you select this radio button and click Continue, a new iteration cycle starts with step 1 and the selection of the spot colors to be optimized.
  2. View the evaluation results in the Archive tab: If you have already completed several iterations or would like to see the evaluation results once more, select this option. When you click Continue, the Archive tab opens.
  3. Close this dialog: If the evaluation results are fine or if you want to end the iteration process you can simply select Close this dialog and by clicking Continue the iteration is ended. 

The checkbox Repeat Job works independently from the three radio buttons. If it is enabled when clicking Continue the last job is converted again with the configuration. This is especially helpful if the spot colors of that last job have been optimized by the wizard which in turn optimizes the spot color settings in the configuration to improve the spot color rendering. 

You will find the optimized device values (Output values) in the table of the tab Spot Colors under Configuration. They will be marked as Iterated in the column Information of the table. 

Archive

All data created during the iteration – such as test charts, reference data and measurement data, as well as the report – are stored in an internal database in addition to the save location defined by the user.

Therefore, if data is deleted from the save location it can still be restored from the internal database any time via the Archive tab. Users can stop an iteration process and even close the Spot Color Iteration Wizard dialog at any time and can revert back to the last completed step with the help of the information stored in the Archive.

The Archive tab shows all iteration steps and evaluation details. The History table contains a list of all iterations. More information for the selected iteration step is displayed under Details.

The columns of the History table show the iteration step number #, the maximum DeltaE00 value dE00 (max), the average DeltaE00 value dE00 (avg), the Status of the selected iteration step. It also shows some Information about the iteration process itself, such as Optimization applied, when the measurements done from the printed test chart have actually been used to iterate a spot color, or Evaluation measurement, when the measurements have been used for evaluation only and have not been used to iterate a spot color.

In addition, the iteration process (being performed in the Current Iteration tab) can be discontinued, which is indicated with various messages such as Next step: save chart, Next step: measure or load data, Next step: Evaluate.

Right clicking on an iteration step in the History displays a context menu with the following options:

Save Chart: Exports the test chart into a file selected by the user. The test chart is not newly created but only copied from the internal database. This implies that the file selection only supports the file type initially chosen by the user.

Save Reference Data: Exports the reference data that belongs to the test chart into a file selected by the user.

Save Measurement Data: Exports the measurement data into a file selected by the user.

Save Report: Saves a report containing all Details displayed on the right and the full information about each spot color. This is useful to identify colors with the highest or lowest deltaE values, or colors which are out of gamut. The report is explained in more detail below.

Revert to state before: This is only available for iterations with the status applied. Reverts back to the state before this iteration, giving the previous iteration, if any, the applied state. The status changes to evaluation measurement. All subsequent items are deleted.

Revert to state after: This is only available for iterations with the status applied. Proceeds to the state after this iteration step, making it the active iteration. The status of a next iteration, if available, would be evaluation measurement. All subsequent items after the next iteration are deleted.

Apply Optimization: This is only available for iterations with the status evaluation measurement. It can be used for evaluation measurements that have not been applied in the iteration process itself. Use this option if you want to apply an iteration later on.

Evaluation Results

The Evaluation Results shown under Details are always the evaluations of the previous step. This means, if an iteration has been applied in step 1, the evaluation results shown under Details for the selected step 1 are the values before the iteration has actually been applied. Therefore, in order to see the results of the first iteration a second step is necessary. The evaluation results shown for that second step are actually the iteration results of the first iteration step, and so on. This offers the possibility to use the results of an iteration itself for a second iteration. But again, another measurement step is needed to find out if this iteration actually improved the result.

The Report

By right-clicking on an iteration step in the left table, a report can be created for this step which can be saved in various formats such as PDF, HTML, XML and TXT. The PDF and HTML formats are the most common versions for end users, while the other formats are more intended for automation and usage in other systems such as a MIS (Management Information System). The following is a description of the PDF report.

The Report contains all information about the spot color Name, the device values generated by ZePrA (displayed in the color space of the target profile) and the measured Lab values as well as the dE2000 and dE76 deviations from the reference Lab values of the spot color and the Status. Under Status it is displayed whether the respective spot color has been well matched (less than 1 deltaE2000) and whether it can still be optimized. If the match of a spot color is smaller than 2 dE00 but larger than 1 dE00 and the match can be further improved, then it is displayed in yellow in the Status column. Finally, spot colors with a deviation higher than 2 dE00 will be highlighted in orange. If a color cannot be optimized or is out-of-gamut, it cannot be improved, which is also displayed in the Status information. The Legend below the table explains additional information messages that can be displayed.

Video Tutorial: Spot Color Iteration Wizard

ZePrA | Apply Photoshop color corrections to PDF files

Apply Photoshop color corrections to PDF files

In some applications it is not possible to use measurement based DeviceLink profiles. This is true, for example, if a customer brings print data and a print that should be as accurate as possible in the production run without a correct proof. If you view the print data on a monitor with a soft proof of the print standard for the production run, clear deviations from the print that you have brought with you can become visible.

In this case you could either print outside the standard and try to recreate the default – either by making gradation corrections in ZePrA or by using the capabilities of the printing press – or print inside the standard by applying Photoshop corrections to the PDF file. The latter has the advantage that you can proof the color-corrected data according to the standard and have it approved by the customer. This procedure requires an experienced Photoshop user and CoPrA’s Editing tool.

For a test with production data the demo version of the programs can also be used. To do this, meaningful objects must be combined from the existing PDF data into one file in Photoshop and combined with CoPrA’s test chart (EditTarget). This test file is then corrected under softproof conditions on the monitor. The edited image is imported into CoPrA and the corrections are taken into account in the created DeviceLink profile.

Then the DeviceLink profile can be used in ZePrA to correct the color of the original PDF data. If necessary, the corrections can be approved by the customer on a proof before printing. The printer can work as usual according to standard and reach the proof reliably.

The individual steps are described in detail in the chapter How to create DeviceLink profiles with edited charts in the CoPrA Help.

ZePrA | Proofing

Proofing

Color-consistent simulation of the printing result

Proofing

ZePrA’s sophisticated technology – e.g. the quality of DeviceLink and SmartLink profiles and the spot color rendering of its advanced spot color module – can be used for proofing as well. This is especially useful as many RIPs do not support CxF/X-4 data and SCTV calibration nor have a spectral color prediction model for spot color rendering.

The Proofing tab under Configuration contains all Media wedge settings and the Proofing Information label.

Media Wedges

Two types of media wedges can be used:

  1. Media Wedge in Simulation Color Space: Can be used to determine the accuracy of the proof. This media wedge is converted based on the color management setting defined in the various configuration tabs.
  2. Media Wedge in Proofer Color Space: Allows using a second media wedge that is not color managed. It must be in the color space of the proofer and can be used to determine the stability of the proof printer.

Choose a Media Wedge.The media wedge is added outside the document’s media box to verify the proof. This can either be a dynamic or an external media wedge.

Dynamic Media Wedge: Uses the color space information of the simulation color space and dynamically adds all spot colors of the documents to be processed. The required reference files for measuring the wedges are created on-the-fly by ZePrA. They will be saved in the Folder for Report and other Data folder of the proofing queue that has automatically been set up by the Auto Setup Wizard.

Note: Currently, a maximum of 32 channels is supported for dynamic media wedges.

The reference files for dynamic media wedges contain both the device values (DCS values) and the target Lab values. The target Lab values are also calculated for the spot colors of the job and incorporated into the reference file in addition to the color values of the document color space. This is done according to the settings under Configurations > Options (solid tone only or gradation values as well) and Configurations > Spot Colors.

The measured values obtained can then be immediately compared to the target Lab values (e.g. in ColorAnt/Compare). Use these reference files in appropriate tools, such as ColorAnt’s Measure Tool, for measuring.

Note: Reference files are not created when the report folder Folder for Report and other Data is missing. If you convert a normal queue by enabling proofing, you must create this folder manually so that a reference file can be created. If this folder is missing, no reference file can be created.

Reference files are created for each job in the queue and named as follows:

Jobname_DynamicMediaWedgeReferenceSource
Jobname_DynamicMediaWedgeReferenceTarget

If dynamic media wedges are selected for source and target color spaces, two reference files for each job will be created.

Note: If the same job is run again, the reference file will be overwritten. This means that if the spot color patches are changed under Options, a modified reference file is saved, and any previous conversion with the reference file with a different number of patches is lost.
The use of spot colors for the dynamic media wedge can be defined under Options 

Media Wedge from File: Can be media wedges such as the FOGRA, UGRA, Idealliance* or other media wedges. For external media wedges, the corresponding reference file is required to measure the printed wedge. Measurements can be done with any proof evaluation software or with ColorAnt’s Measure Tool.

*The IDEAlliance ISO 12647-7 Control Wedge 2013 is included in ZePrA and available under /Users/Shared/ColorLogic/MediaWedges (Idealliance ISO 12647-7: 2013, 3-Row Digital Control Wedge ® is a registered trademark of the Idealliance).

Note: A separate ColorAnt license is required to use the measurement and comparison features.

Proofing Information: Enabling this checkbox will add text information which are in accordance with ISO 12647-7 such as information about the job, date and time, conversion settings and the software used. The information that will be added to the converted file can be verified and edited in the text field. For editing switch to Custom.

Position: The two media wedges and the proofing information label can be positioned independently on the converted document. For each of these 3 elements, the user can specify where it should be placed. Positioning options are: Automatic, Bottom Margin, Right Margin, Top Margin, Left Margin. The elements are placed outside the media box of the document according to this setting. This results in an enlarged media box in the converted document. Automatic is suggested as default settings for all 3 elements to make sure that they are placed together on the converted job.

Options: General settings and settings for Dynamic Media Wedges can be defined unter Options.

Media Wedge Options

General

Font Size: Defines the font size used for the proofing information label in points.

White Space: Allows the placement of margins on media wedges by entering a user-defined distance in mm. By default a white space of 15 mm is added. This ensures that enough white space is added on the left and right of the placed media wedges which some instruments need for correct measuring. The White Space margin applies both to external and dynamic media wedges.
Note: If the external media wedge already has a margin, we recommend entering 0 mm as White Space. As a rule of thumb the white space in millimeters for dynamic media wedges should be at least the size of the Patch Width. The white space of the Media Wedge in Simulation Color Space is color managed whereas the white space of the Media Wedge in Proofer Color Space is not.

Place on every page: For multi-page PDF files media wedges can be placed on each page. By disabling the checkbox media wedges will be placed on the first page of the PDF only.

Dynamic Media Wedges

Defines the Default Chart Width, the Patch Width and the Patch Height of the dynamic wedge.

Gap Size: To separate individual patches. Select the width in mm.

Patch Distribution: Defines the distribution of patches on the media wedge.

  • Randomize: Color patches are distributed randomly.
  • Normal: Color patches are distributed as specified in the reference file.
  • Sorted: Color patches are sorted from light to dark.

Patches per Spot Color: Defines whether spot colors are to be used in the dynamic media wedge and, if so, whether tints are to be used.

  • None: No spot color is added to the dynamic wedge.
  • Solid Tone: Only the solid tone of each spot color in the job is used in the dynamic wedge.
  • 3 Patches: Uses the following patches for each spot color: 100%, 70%, 40%.
  • 5 Patches: Uses the following patches for each spot color: 100%, 70%, 40%, 20%, 10%.

Exclude Colors from dynamic wedges: Spot colors are used in documents for various reasons besides printing purposes, e.g. to illustrate the DIE cut lines, or varnish, braille or other non printing elements. Obviously, those colors are not to be used in the dynamic media wedge. To avoid using them in media wedges, create a library (or more if needed) containing all spot colors to be excluded and select it (or them) from the list under Exclude Colors from dynamic wedges. This list contains all spot color libraries managed by ZePrA. Enable the checkboxes of only those libraries which contain the colors to be excluded.

The selected libraries containing the colors to be excluded are also applied to spot colors of external media wedges. Typically, if the Document Color Space is Multicolor, ZePrA assignes the channels of the Document Color Space to the channels of the media wedge. This is intended in most cases, e.g. if a 7C media wedge with generic channel names is used for a 7C Document Color Space in such a way that the channels are associated. However, this is not intended in case a spot color White is to be used as 5th channel and the 5th channel in the Multicolor profile of the Document Color Space is called Orange (for example). To retain the white spot colors an exclusion library which contains White as non-printing color can be selected.

Video Tutorial

How to Use the Proof Evaluation Tool in ColorAnt in combination with ZePrA

Learn step-by-step how to use the Proof Evaluation tool in ColorAnt for the evaluation of a proofing media wedge created with ZePrA. In this example, we will be demonstrating the special feature of ZePrA to create a dynamic media wedge using process and spot colors and how to use the supplied reference data from ZePrA for evaluation of a Contract Proof.

ZePrA | Troubleshooting

Troubleshooting

Detect and resolve errors

Overview

To prevent errors and problems when processing files, ZePrA checks configurations and hot folders as well as settings and licenses.

If errors or problems are detected, an error message appears in the lower left of the ZePrA window.

If you click on this message, the error is displayed. If several errors are detected, a list of all errors is displayed.

Another click on the corresponding message opens the Troubleshooting dialog, which lists possible solutions to the problem found, which can then be applied to resolve the error.

Causes of errors

Errors can occur, for example, if certain profiles (or spot color libraries) are used in a configuration without embedding them in the configuration, and this configuration is then transferred to a computer on which these profiles (or spot color libraries) are not available. It is then not possible to process files with this configuration.

But certain combinations in the settings can also cause problems.

ZePrA therefore checks:

  • Configurations
  • Settings
  • Hotfolder (all required folders must be available)
  • Profiles (all required profiles must be available on the computer)
  • Gradation curves (all required gradation curves must be available on the computer)
  • Licenses (all required licenses must be available on the computer, depending on the job this can be SmartLink, Multicolor, spot color or SaveInk licenses)
  • Spot color libraries (all required spot color libraries must be available on the computer)

Troubleshooting

In the Troubleshooting dialog, the identified problem is described and options for solving the problem are suggested.

Some problems can occur in multiple configurations and can be solved immediately for all affected configurations, for example, when using the Perceptual Rendering intent in combination with SmartLink.

Click on the message to open the Troubleshooting dialog. Here, by selecting the Solve the issue automatically checkbox, you can switch all affected configurations to Standard Compression without having to change each configuration individually.

ZePrA | Push 2 ZePrA

Push-2-ZePrA

Process PSD files directly from Photoshop

What is Push-2-ZePrA ?

Push-2-ZePrA is an Adobe Photoshop extension that allows color converting an image file selected in Photoshop with ColorLogic’s color server ZePrA from Photoshop. Depending on the color server settings high quality color conversions with DeviceLink profiles will be performed leading to better color rendering of images than typical color conversion with Photoshop. Even spot colors can be converted if the selected ZePrA configuration is set up accordingly. The converted file will be opened up in Photoshop so that you do not need to leave Photoshop in order to get the best possible color converted images.

Push-2-ZePrA System Requirements
  • macOS X 10.13 and higher
  • Windows 8 and higher
  • Adobe Photoshop CC 2017 and higher.
  • On modern Mac computers with M1 Apple Silicon processors make sure that you start Photoshop via Rosetta. The Push-2-ZePrA extension does not run natively with the M1 chip.
  • ZePrA 9 and higher/Push-2-ZePrA v2 and higher: The 2nd edition of Push-2-ZePrA has network capability. This eliminates the need for ZePrA to be installed on the same computer as Photoshop.

Note: The Push-2-ZePrA v2 Photoshop extension is integrated with a 1-client license in ZePrA XL and XXL. Additional 5-client or 10-client multi-user licenses can also be purchased. For ZePrA 9 Entry, Basic and L, the Push-2-ZePrA v2 Photoshop extension single and multi-user licenses can be purchased as add-ons.

Installation
  1. Use the installer for macOS or Windows for your respective operating system.
  2. Close Photoshop before installation and follow the easy-to-use installer.
  3. Once installed, start Photoshop, go to Window/Extensions and select Push-2-ZePrA to open the extension.

Using Push-2-ZePrA locally

Using Push-2-ZePrA locally

Configuring the Push-2-ZePrA clients in Photoshop:

  1. Once the Push-2-ZePrA extension is installed, start Photoshop, go to Windows/Extensions and select Push-2-ZePrA to open the extension.
  2. Click the Gear icon.There are two ways to connect to the ZePrA server: locally or remotely. If your Photoshop/Push-2-ZePA installation is on the same computer as the installed ZePrA color server you should always prefer the ZePrA Local option as this is much faster than communicating via the network. Click ZePrA Local.

  3. Under ZePrA Path navigate to the ZePrA.app on macOS or zcmd.exe on Windows and select it.
  4. Define your Local Output Path (where converted files are to be saved) and click the Home button. You can then immediately use the extension.

Using Push-2-ZePrA locally

When ZePrA is installed on the same computer as Photoshop:

  1. In Photoshop, open the image to be color converted.
  2. Click on the Push-2-ZePrA extension.
  3. On the Home tab select a ZePrA Configuration from the drop-down menu. The drop-down list will show all the configurations set up in ZePrA.
  4. Choose a configuration that fits your requirements in terms of Target Color Space and retaining of Photoshop Layers. This information is shown below the drop-down menu and picked from the selected configuration.
  5. Click Convert.
  6. After a few seconds, the progress will be displayed, and the converted file will be opened up in Photoshop.
  7. Output folder for local use: Converted files are always saved in the same location as the original file and the configuration name will be appended to the original file name.
    Notes: If the original file has been edited or copied in Photoshop without saving, a temporary file needs to be created by Push-2-ZePrA. The edited and the converted temporary files are saved in the output folder defined under Local Output Path.
    If the original file is located in a read-only folder, the user will be asked if the converted file is to be saved in the output folder defined under Local Output Path.

Note: ZePrA’s Command Line Interface (CLI) is used for the conversion but not the ZePrA application itself. Therefore you won’t find any of the images that have been converted via the Push-2-ZePrA extension in ZePrA’s Overview or hot folders.

    Using Push-2-ZePrA over the network

    Connecting Push-2-ZePrA with ZePrA over the network

    Note: Requires ZePrA 9 or higher and Push-2-ZePrA v2 or higher.

    The 2nd edition of Push-2-ZePrA has network capability. This eliminates the need for ZePrA to be installed on the same computer as Photoshop.

    ZePrA 9 and higher has an integrated Push-2-ZePrA remote server, while the Push-2-ZePrA extension acts as a client application that can access ZePrA from a remote Photoshop installation over the network.

    Therefore, several users who have the extension installed in their Photoshop application can remotely access the same ZePrA server. The Photoshop clients can thus be used on different computers, but also under different operating systems than the ZePrA server.

    Establishing a connection

    Configuring the ZePrA server:

    1. Open the Server Settings from the Tools menu in ZePrA.
    2. Specify the IP address of the computer ZePrA is running on and set a Port. See your system administrator for IP and port information. You will need to enter both the IP address and the port number in the Push-2-ZePrA extension on all client computers.

    3. Click Start to activate the server. The Status changes to Server is running and the License Status indicates the number of licenses in use as well as the number of available licenses.
    4. Stop closes the server and the extensions will no longer work. Closing ZePrA does not stop the server service but shutting down the computer will. So when restarting the computer make sure to restart the ZePrA server in the Server Settings dialog so that the extensions can access it.

    Note: Under macOS the IP address of the computer can be found in the System Preferences/Network settings. Under Windows the IP address can be found under Settings > Network & Internet > Status > View hardware and connection properties.

    After a ZePrA update, stop the server and restart both ZePrA and the server. This way the newest version of the server will be used.

    Configuring the Push-2-ZePrA clients in Photoshop
    1. Install Push-2-ZePrA and open it in Photoshop.
      Note: On Macs with Apple Silicon M1 chip make sure to start Photoshop with Rosetta – see System Requirements.
    2. Click the Gear icon.
    3. There are two ways to connect to the ZePrA server: locally or remotely. If your Photoshop/Push-2-ZePA installation is on the same computer as the installed ZePrA color server you should always prefer the ZePrA Local option as this is much faster than communicating via the network. If your Photoshop/Push-2-ZePA installation is on a different computer, use the ZePrA Remote option.

    4. To use the ZePrA Remote option, enter the previously defined ZePrA server settings (Server IP Address and Server Port Number) under ZePrA Remote and click the Connect button under Test Connection. The connection status is displayed.
    5. When the connection is successfully established, define your Local Output Path (where converted files are to be saved) and click the Home button. You can then immediately use the extension.

    Note: If all available licenses are linked with the ZePrA server, additional Photoshop extension users will not be able to connect to the ZePrA server. The licenses are linked to the ZePrA server on a first come first served basis.

    Note: In order to use the Photoshop extension, the ZePrA remote server must be running. Once the server has been started in ZePrA, it will run even if the ZePrA application is closed later on. Only when the computer is shut down, the server is also shut down and must be restarted in ZePrA after the computer is restarted.

    Use the Question mark icon to access the Push-2-ZePrA online help page, and the Exclamation mark icon to get the version numbers of the extension and the ZePrA Remote server.

    Using Push-2-ZePrA remotely

    When ZePrA is accessed over the network:

    1. Open up an image in Photoshop to be color converted.
    2. Click on the Push-2-ZePrA extension.
    3. Select a ZePrA Configuration from the drop-down menu. The drop down list will show all the configurations set up in ZePrA.
    4. Choose a configuration that fits your requirements in terms of Target Color Space and Photoshop Layers retaining. This information is shown below the drop-down menu and picked from the selected configuration.
    5. Click Convert.
    6. After a few seconds, the progress will be displayed and the converted file will be opened up in Photoshop.
    7. Output folder for network use: Converted files and temporary files are always placed in the output folder defined under Local Output Path and the configuration name will be appended to the original file name.
      Note: If the original file is located in a read-only folder, the user will be asked if the converted file is to be saved in the output folder defined under Local Output Path.

    Note: ZePrA’s Command Line Interface (CLI) is used for the conversion but not the ZePrA application itself. Therefore you won’t find any of the images that have been converted via the Push-2-ZePrA extension in ZePrA’s Overview or hot folders.

    Recommendations and Troubleshooting

    Best Practices

    For image conversions, we recommend setting up Direct Color Conversion configurations in ZePrA with the help of the Auto Setup Wizard. With a direct conversion from the image color space to the Target Color Space, double conversions are avoided. It is not recommended to use a Normalize and Convert queue as this can lead to converting the image two times (a double conversion – from the image color space to the Document Color Space and then to the Target Color Space), which typically is not wanted for image conversions.

    For any changes in terms of PSD or TIFF file layers handling, color conversion or spot color conversion, please adjust the appropriate ZePrA configuration in the ZePrA color server. The Push-2-ZePrA Photoshop extension uses the configurations, but editing configurations is not supported.

    Error Handling

    When working with the Push-2-ZePrA extension potential issues might happen:

      1. The maximum file size that can be processed via the remote connection is currently 512 MB. Larger files can be processed directly via ZePrA Queues.
      2. Multiple versions of Photoshop CC must not be installed.
      3. Select the proper file for conversion: When several images are open in Photoshop keep in mind that only the selected, active document will be converted with Push-2-ZePrA.
      4. Incomplete conversions: When clicking the Convert button it may take a few seconds until the image is converted. During processing (the progress will be displayed), do not close the Push-2-ZePrA extension nor minimize Photoshop. This will immediately stop the conversion.
      5. Restricted folders and locations: A warning message appears when trying to save a file in a restricted location. If the selected location (folder) is read-only (for example, the application folder of an operating system), a warning message is displayed prompting you to cancel the conversion or save the converted file to the Local Output Path.
      6. Troubleshooting job warnings: An error message with the selected configuration appears. In such a situation, check the corresponding configuration in the ZePrA application and check for the cause of the error. It may be that the image file and the setting in the configuration do not match. In such a case, it is suggested to convert the image file in the ZePrA application with the same configuration used in the Push-2-ZePrA extension. The same job warning message may show in ZePrA. Troubleshoot the issue and change the settings in the ZePrA application, until the file conversion works as desired. Once the configuration has been saved in ZePrA go back to the Push-2-ZePrA extension, close it and reopen the extension to update the list of configurations and settings and convert the file in Photoshop again.
        Note: Push-2-ZePrA supports the same image file formats as ZePrA, e.g. JPEG, TIFF and PSD. Unsupported file formats, such as PNG, will generate file format errors.
      7. Changes and updates to configurations: When changes or updates to ZePrA configurations have not been applied in the Push-2-ZePrA extension, make sure that the edits have been saved in ZePrA before heading to the Photoshop extension. Then close the extension and start it again so that it refreshes the list of configurations and their settings.
      8. Support for prior ZePrA versions: ZePrA versions prior to v9 are not supported. The extension may show the settings of configurations from older ZePrA versions, but will not convert files. We do not recommend selecting prior ZePrA versions with the extension and will not be supporting prior versions in future releases.
      9. Avoid special characters in configuration names: characters such as | < > * ? / \\ : in configurations names with ZePrA. While ZePrA will handle such characters the Push-2-ZePrA extension does not.

    ZePrA | Interface

    User Interface

    Operation and Special Features

    Sidebar

    ZePrA’s sidebar allows quick access to all main workflow functions. Simply klick the Home button on the left and select the required module.

    The colored bar below the title bar shows the tool you are currently using.

    Start

    Auto Setup

    Create workflows with ZePrA’s Auto Setup Wizard

    Main Setup and Overview

    Overview 

    View queues, pending jobs and processed jobs

    Configurations 

    View and customize processing settings

    Queues 

    Manage print jobs

    Tools

    Spot Color Report 

    Check the accuracy of spot color conversions prior to printing

    SaveInk Report 

    Generate an overall ink saving report

    Extract ICC Profile 

    Extract ICC profiles from images and PDF files

    Global Settings

    Spot Color Libraries 

    Manage libraries and edit spot colors

    Gradations

    Manage and create tone value correction curves

    Profile Assignments 

    Use existing or dynamically created DeviceLinks for file conversions

    Menu Bar

    Navigation

    Use the shortcuts in the menu to navigate easily and conveniently through all ZePrA modules.

    Access the most important modules via shortcuts

    Tools

    ZePrA’s Tools menu

    Auto Setup
    Calls the Auto Setup Wizard.

    Importing and Exporting Configurations

    For saving complete configurations containing settings for hotfolders and used ICC profiles. This allows all settings to be transferred to another system (e.g. in case of a technical malfunction on the current system). In addition, configurations can be exchanged and transferred between different locations.

    When exporting and importing configurations, the association of the configuration with a queue is also considered. If a configuration assigned to a queue that already exists is imported, the new configuration is linked to the existing queue.

    Export Configurations: Opens the Export Environment window. The configuration sort order can be changed using the icon to the right of the list of configurations. Configurations can either be listed in the default sort order (by creation date) or in an alphanumeric order.

    Select the configuration(s) you want to export by activating the corresponding checkbox(es).

    Exporting selected Configurations

    Export All Configurations: Exports all configurations including the ICC devices and DeviceLink profiles used. Activate the respective checkboxes to Export Profile Assignments and to Export Spot Color Libraries.

    Export all configurations. Profile assignments and spot color libraries can be exported along with the configuration.

    Export ICC Profiles: Exports all ICC device profiles and DeviceLink profiles used in the selected configuration(s).

    Export Profile Assignments: Exports all settings including the profile table created under Profile Assignments, however this does not export the DeviceLink profiles created in SmartLink.

    Export Spot Color Libraries: If individual configurations are selected, only those libraries which are used in the selected configurations will be exported, if Export all Configurations is selected, all libraries will be exported.

    Export Media Wedges: Exports the media wedges of the selected configuration(s).

    Click OK, enter a filename and Save the *.CCF file including the configurations and ICC profiles. Subsequently, the window Information provides information about license terms regarding the import and export of ICC and DeviceLink profiles.

    License agreement notes

    Importing Configurations

    1. Select a previously exported or otherwise provided *.CCF file. The Import Configurations window opens.

      Choosing configurations to import

    2. Select the Desired Base Folder which is where the hot folder should be created when importing configurations.
    3. Click on OK and the configuration is immediately available.

    Imported configurations are inactive until activated in the Overview window.

    Activating the checkbox Use Paths from imported File preserves the original hotfolder paths of each configuration.

    Configurations that already exist in the import system are marked with an asterisk (*). Disable the checkbox to prevent these configurations from being imported and overwriting existing configurations.

    By default, ZePrA creates the imported queues under Desired Base Folder.

    Use Paths from imported File: Activating this checkbox preserves the original hotfolder paths of each configuration.

    Note: If the exact folder structure of the exporting system cannot be created during import, e.g. when importing a configuration from a Windows system to an Apple system, the subfolders defined by the exporting system cannot be retained. Instead, the default folders (Input, Done, Output, Error) are then created in the ZePrA Base folder.

    Extract ICC Profile
    Extracts the embedded profile from images and the output intent from PDF/X files. The extracted profile can then be saved to any location.

    Install DeviceLink Profiles
    Opens the DLS Manager. The DLS Manager is used to install and update DeviceLink sets (DLS). License keys for the required sets can be purchased from your ColorLogic dealer. With a demo installation, all or individual sets can be installed and tested. Please note, however, that demo profiles installed during a demo can no longer be used on a permanent license for ZePrA. The DeviceLink sets will be available for further use after they are purchased.

    SaveInk Report
    The SaveInk report provides a detailed overview of the color savings of all SaveInk queues and processed jobs.

    Spot Color Report
    The Spot Color Report shows which results are achieved with a spot color conversion in respect to deltaE00, deltaE76 and separation into the process colors. This allows to verify the accuracy of the spot color conversion before printing and to determine in advance how spot colors (e.g. Pantone® colors) of specific PDF and image files will be converted by ZePrA.

    Spot Color Iteration
    Deviations from the theoretically achievable minimal color differences are caused by printing, material and color variations  during production.
    Deviations can be minimized in ZePrA using Spot Color Iteration. This feature is primarily for particularly high demands of accuracy and reproduction of spot colors, for example for digital printing or proofing, which require the  conversion of spot colors to process colors.
    The Spot Color Iteration tool provides a step-by-step guide starting from the selection of the spot colors being iterated, preparation and printing of measurement of test charts and finally, optimization of  the conversion, including the creation of reports.

    DeviceLink Iteration
    Iteration can be necessary to achieve the best possible color match, especially when proofing. To apply an iteration, a special test chart must be converted with the desired color management settings of a given configuration, printed and measured. Based on the measurements the DeviceLink profile can then be optimized. After one to three iteration cycles, a closer match in terms of DeltaE values is achieved. This process is error-prone if done manually, however, it is easy to accomplish with the help of the DeviceLink Iteration Wizard, which guides you through each step.

    Tag Management
    All existing tags are listed in a table under Tag Management. It can be opened via the Tools menu and is especially useful if tags are to be edited or removed from several configurations. The Used in column indicates how many configurations use a tag. With the buttons on the right New tags can be entered and existing tags can be removed (affects all configurations) or renamed (also affects all configurations).

    Server Settings
    ZePrA 9 and higher has an integrated Push-2-ZePrA remote server, while the Push-2-ZePrA Photoshop extension acts as a client application that can access ZePrA from a remote Photoshop installation over the network.

    Therefore, several users, who have the Push-2-ZePrA extension installed in their Photoshop application, can remotely access the same ZePrA server. The Photoshop clients can thus be used on different computers, but also under different operating systems than the ZePrA server.

    The detailed server setup procedure is described under Push-2-ZePrA > Connecting Push-2-ZePrA with ZePrA over the network.

    DeviceLink Iteration

    Overview

    Iteration can be necessary to achieve the best possible color match, especially when proofing. To apply an iteration, a special test chart must be converted with the desired color management settings of a given configuration, printed and measured. Based on the measurements the DeviceLink profile can then be optimized. After one to three iteration cycles, a closer match in terms of DeltaE values is achieved. This process is error-prone if done manually, however, it is easy to accomplish with the help of the DeviceLink Iteration Wizard, which guides you through each step.

    Video Tutorial

    Overview of the DeviceLink Iteration Wizard in ZePrA.

    Procedure

    The iteration starts by selecting the configuration containing the DeviceLink to be iterated. This can be done in three different ways:

    1. In the Queues section of the Overview, select the queue and configuration you want to iterate. Open the context menu with a right click and select DeviceLink Iteration.

    2. Select DeviceLink Iteration from the Tools menu and search for the desired configuration in the Configuration drop-down menu of the appearing DeviceLink Iteration Wizard. You can use the same search and sort functions that you are familiar with from the Configuration drop-down menus elsewhere in ZePrA to find the configuration you are looking for.

    3. Open the desired Configuration in the Document/Target tab and click on the Iterate button at the bottom of the Conversion section.

    The DeviceLink Iteration Wizard dialog consists of two tabs, the Current Iteration and the Archive tabs. The Current Iteration tab contains the actual iteration wizard and typically, if a configuration is selected that has not yet been iterated, the wizard is started directly there. The Archive tab contains all the iteration steps that have been carried out, including all the evaluation details.

    Current Iteration

    The wizard guides the user through the iteration process in these four steps:

    1. Create test chart to be printed
    2. Print and measure test chart
    3. View Evaluation Results
    4. Continue or end the iteration

    Step One: Create the test chart to be printed

    There are two possibilities to create the test chart. Either you use the included Default Iteration Chart, which of course is always optimized for the color space of the given configuration. Or, select your own reference file (TXT, CXF3, XML) of a custom chart under Custom Iteration Chart.

    After that, define your measurement Instrument Settings. Various settings for the supported measurement equipment can be selected from the drop-down menu in the Measure Tool (the Measure Tool is included in ZePrA).

    Note: ColorLogic ColorAnt users can create their own instrument settings optimized for their specific requirements in the Export Chart tool.

    Click Save and choose a file format (PDF, TIFF or PSD) to create the test chart in the selected location. All color management settings of the configuration will be applied automatically.

    Note: In some cases the creation of the chart may take some time, for example if the Conversion settings SmartLink or Device Profile are used in the configuration, as the wizard will then need to create a DeviceLink profile first.

    After you successfully created the chart and the associated reference file, a message and a green check mark indicate that you can now proceed to the next step by clicking the Continue button.

    Step Two: Print and measure test chart

    The second step consists of two operations. First, the chart created in step 1 must be printed on the printer without color management settings. Then, after drying, the print must be measured. If the Measure Tool is to be used, simply click on the Measure button. You do not need to worry about the reference file and layout, as this is already preselected within the Measure Tool. Instructions on how to select your device and make measurements using the Measure Tool can be found here.

    Note: Alternatively, you can use the previously exported reference file and measure your printed chart with a different measurement tool. Make sure that the measurements are saved in standard file formats that can be read by ZePrA, such as CGATS TXT, XML or CXF3. The external measurement files can be loaded using the Load button.

    Once the measurement data has been transmitted from Measure Tool or loaded from external sources and it conforms to the printed chart a green check mark indicates a match and you can proceed by clicking Continue.

    Note: When loading measurement data that does not match the chart layout or the corresponding patches in the reference file, you are alerted by a warning message and proceeding to the next step is not possible.

    Step Three: View Evaluation Results

    The third step shows the Evaluation Results of the measurements compared to the desired color conversion.

    If all categories such as substrate, the maximum and average deltaE for all patches, etc. are within their limits they are marked green and the overall result is marked all right.

    In a proofing case, e.g if an absolute colorimetric rendering intent was used in the configuration, the proof print is compatible with a Contract Proof according to ISO12647-7 and the wizard indicates this by a green check mark and a corresponding note text. A further iteration is then not required, hence the Don’t apply Optimization radio button is preselected.

    However, the preselection can be overridden and another iteration cycle applied if the results are to be improved even further. To do this, select the Optimize DeviceLink and apply radio button and click Continue. Alternatively, apply the iteration later via the Archive tab.

    If only a single category is displayed in orange or red in the table of Evaluation Results, the proof print is considered to be not okay and the validation has failed. In this case, a warning is displayed and it is suggested to apply an iteration to improve the result. The corresponding radio button Optimize DeviceLink and apply is then preselected.

    By selecting Optimize DeviceLink and apply and clicking on Continue, an iterated DeviceLink is created on-the-fly and automatically entered in the configuration.

    ZePrA checks for out-of-gamut colors and evaluates whether those colors can be improved. Color values that are displayed in red in the Evaluation Results and Report are considered to be out-of-gamut and their deltaE00 values can most likely not be improved. Nevertheless, an iteration can slightly change the rendering of out-of-gamut colors, for example, to correct hue errors when colors are far from the desired hue. Color values that are displayed in orange, however, can be improved with further iteration. If there are only red values left, ZePrA informs, that further iterations are of no use and preselects the Don’t apply Optimization radio button. If, however, there are orange values left, these can be further optimized and ZePrA suggests Optimize DeviceLink and apply.

    Step Four: Continue or end the iteration

    The fourth step concludes the iteration cycle. Here, there are three options to choose from. Based on the previous results, the wizard already preselects a logical option for you to follow:

    1. Optimize DeviceLink Profile again: Runs another iteration cycle, for example to check whether a previously iterated DeviceLink successfully passes the evaluation. If you select this radio button and click Continue, a new iteration cycle starts with step 1 and the creation of a new test chart to be printed.
    2. View the evaluation results in the Archive tab: If you have already completed several iterations or would like to see the evaluation results once more, select this option. When you click Continue, the Archive tab opens with the last iteration step highlighted.
    3. Close this dialog: If the evaluation results are all right or if you want to end the iteration process you can simply select Close this dialog and by clicking Continue the iteration is ended.

    Archive

    All data created during the iteration - such as test charts, reference data and measurement data, as well as the report - are stored in an internal database in addition to the save location defined by the user.

    Therefore, if data is deleted from the save location it can still be restored from the internal database any time via the Archive tab. Users can stop an iteration process and even close the DeviceLink Iteration Wizard dialog at any time and can revert back to the last completed step with the help of the Information stored in the Archive.

    The Archive tab shows all iteration steps and evaluation details. The History table contains a list of all iterations, with the active iteration highlighted. More information for the selected iteration step is displayed under Details.

    The columns of the History table show the iteration step number #, the maximum DeltaE00 value dE00 (max), the average DeltaE00 value dE00 (avg), the Status of the selected iteration step and some Information about the iteration process itself, such as Optimization applied, when the measurements done from the printed test chart have actually been used to create an iterated DeviceLink, or Evaluation measurement, when the measurements have been used for evaluation only and have not been used to create an iterated DeviceLink.

    In addition, the iteration process (being performed in the Current Iteration tab) can be discontinued, which is indicated with various messages such as Next step: save chart, Next step: measure or load data, Next step: Evaluate.

    Right clicking on an iteration step in the History displays a context menu with the following options:

    Save Chart: Exports the test chart into a file selected by the user. The test chart is not newly created but only copied from the internal database. This implies that the file selection only supports the file type initially chosen by the user.

    Save Reference Data: Exports the reference data that belongs to the test chart into a file selected by the user.

    Save Measurement Data: Exports the measurement data into a file selected by the user.

    Save Report: Saves a report containing all Details displayed on the right and the full information about each measurement patch. This is useful to identify colors with the highest or lowest deltaE values, or colors which are out of gamut. The report is explained in more detail below.

    Revert to state before: This is only available for iterations with the status applied. Reverts back to the state before this iteration, giving the previous iteration, if any, the applied state. The status changes to evaluation measurement. All subsequent items are deleted.

    Revert to state after: This is only available for iterations with the status applied. Proceeds to the state after this iteration step, making it the active iteration. The status of a next iteration, if available, would be evaluation measurement. All subsequent items after the next iteration are deleted.

    Apply Optimization: This is only available for iterations with the status evaluation measurement. It can be used for evaluation measurements that have not been applied in the iteration process itself. Use this option if you want to apply an iteration later on.

    Evaluation Results

    The Evaluation Results shown under Details are always the evaluations of the previous step. This means, if an iteration has been applied in step 1, the evaluation results shown under Details for the selected step 1 are the values before the iteration has actually been applied. Therefore, in order to see the results of the first iteration a second step is necessary. The evaluation results shown for that second step are actually the iteration results of the first iteration step, and so on. This offers the possibility to use the results of an iteration itself for a second iteration. But again, another measurement step is needed to find out if this iteration actually improved the result.

    Evaluation measurements for the different Categories are shown according to the proof evaluation tolerances defined in ISO 12647-7. They can even be regarded as proof evaluation when an absolute colorimetric rendering intent has been used in the configuration. The values shown in the table can assume three different colored states that are green, orange or red. Values shown in green are within the Limit and therefore all right. Orange values are outside the Limit but can be improved by iteration. Red values are outside the Limit and cannot be improved. This is mostly the case if a source color can’t be reproduced in the target color space because it is out-of-gamut. An overall statement of the accuracy of the rendering is given below the table. A green check mark indicates that the color conversion is within the limits, whereas a red cross indicates that it is not.

    Special cases arise if the rendering intent used in the configuration is not absolute colorimetric. In case of relative colorimetric or perceptual rendering intents the reference Lab values used to iterate the conversion need to be calculated from the initial DeviceLink profile. The measurements are then compared to those rendering intent specific reference Lab values. The iteration is still using the tolerances from ISO 12647-7 for the analysis of the iteration accuracy. However, since this conversion is not a proof print, a different statement results for the overall iteration accuracy compared to the iteration result with an absolute colorimetric rendering intent.  

    The Report

    By right-clicking on an iteration step in the left table, a report can be created for this step. The report can be saved in various formats such as PDF, HTML, XML and TXT. The PDF and HTML formats are the most common versions for end users, while the other formats are more intended for automation and usage in other systems such as a MIS (Management Information System). 

    The report contains all displayed Details and the complete information for each measuring patch. This is handy for identifying colors with the highest or lowest DeltaE values or colors that are out-of-gamut. A Legend explaining the color highlighting in the DeltaE column is shown at the bottom of the last page of the report.

    Help

    ZePrA’s Help menu

    What’s New
    Opens the website that shows new features and bug fixes in ZePrA (requires an Internet connection).

    Online Help
    Goes directly to the online help (requires an Internet connection).

    Quick Start Guide
    Opens the download page of the Quick Start Guide (requires an internet connection).

    readme.txt
    Contains the Release Notes with brief information about the latest changes.

    CLI Manual
    Opens the Command Line Interface manual (in PDF format).

    Save Support Data
    Creates a compressed text file that contains important support information. Send this support data to your ColorLogic reseller for expert assistance. The data required includes information about the used operating system, the ZePrA log file, general preferences, and settings at the time of the problem.

    Event Log
    Shows the events that occurred when using ZePrA. Some of the events take place in the background (for performance reasons and to improve the user experience) and are invisible to the user. The event log contains such and other information with the exact time of occurrence.

    Examples:

    • Configurations or spot color libraries exchanged with the Automatic Import feature are automatically updated or added without notice
    • Added or updated SmartLink presets are loaded in the background
    • Automatic stopping or starting of queues, in case hotfolders are temporarily not available due to network problems or other issues
    • Messages and information regarding PantoneLIVE, e.g. login errors and updates
    • The starting and stopping of the program itself

    Automatic Update Check
    Checks whether a new program version is available (requires an Internet connection).

    Enable automatic update check: If activated, ZePrA checks whether a new version is available for download at program startup or once a day.
    If a new version is found, it can be downloaded via the download links given in the window (for macOS or MS Windows).
    The most important new features are briefly described in the window, a detailed description of the new features can be found in the linked “What’s new in ZePrA?

    Register
    Here you can load and activate your licenses, request a demo license, or view further information about your licenses.

    Special Features

    Profile search in drop-down menus
    All profile drop-down menus function like search fields. Simply type in some letters of the desired profile and only those profiles containing these letters will be shown in the list. To select a profile simply click on it. Alternatively you may open the drop-down menu with the arrow on the right and select a profile from the full list as usual.

    Context menus
    A right click on an entry in a table opens a context menu with useful tools specific to the respective table.

    Forward and backward icons
    The two buttons with forward and backward icons at the bottom left allow switching between all opened dialogs similar to the forward and backward buttons of a browser.

    Troubleshooting
    ZePrA automatically checks all settings for errors and inconsistencies, such as missing profiles or incorrectly set rendering intents. In the lower part of the window, a warning message appears that briefly describes the problem and offers a solution. You can then decide whether to ignore the error or have ZePrA fix it automatically.

    For detailed information visit Troubleshooting.

    Screen Preview
    Shows a real color display of your files on the monitor. Also overprinting elements and transparency effects are taken into account. More information about the integrated softproofing can be found in the tutorial Softproofing PDF image files.