Blending colors, Specify how colors blend – Adobe InDesign CC 2015 User Manual
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Transparency
Last updated 6/6/2015
To prevent problems in these cases, use the Ink Manager to convert spot colors to process color equivalents as necessary
prior to exporting from InDesign. Another way to prevent problems is to make sure that your spot inks are consistent
in both the original application (for example, Adobe Illustrator) and InDesign. This may mean that you’ll need to open
an Illustrator document, convert a spot color to process color, export it again to EPS, and then place the EPS file in your
InDesign layout.
Adobe PDF files
Exporting to Acrobat 4.0 (Adobe PDF 1.3) always flattens a document with transparency, which may affect the
appearance of its transparent objects. Nontransparent content is not flattened unless Simulate Overprint is selected in
the Output area of the Export Adobe PDF dialog box. Therefore, when you export an InDesign document with
transparency to Adobe PDF, do any of the following:
• Whenever possible, choose Acrobat 5.0 (Adobe PDF 1.4), Acrobat 6.0 (Adobe PDF 1.5), or Acrobat 7.0 (Adobe PDF
1.6) compatibility in the Export Adobe PDF dialog box to preserve transparency in a live and fully editable form.
Make sure that your service provider can handle Acrobat 5.0, Acrobat 6.0, or Acrobat 7.0 files.
• If you must use Acrobat 4.0 compatibility, your document contains spot colors, and you want to create a PDF file for
on-screen viewing (such as a client review), you may want to select the Simulate Overprint option in the Output area
of the Export Adobe PDF dialog box. This option properly simulates the spot and transparent areas; recipients of
the PDF file won’t have to select Overprint Preview in Acrobat to see how the document will look when printed.
However, the Simulate Overprint option converts all spot colors to process color equivalents in the resulting PDF
file, so be sure to deselect this option when you create the PDF for final production.
• Consider using the predefined [Press Quality] Adobe PDF preset. This preset contains flattener settings appropriate
for complex documents intended for high-resolution output.
Trapping
Flattening may convert vectors to rasterized areas. Traps applied to artwork in Adobe Illustrator using strokes and
placed in InDesign will be preserved. Traps applied to vector artwork drawn in InDesign and then rasterized may not
be preserved.
To keep as many objects vector as possible, select the [High Resolution] transparency flattener preset in the Advanced
area of the Print or Export Adobe PDF dialog box.
More Help topics
Blending colors
Specify how colors blend
Blend the colors between two overlapping objects by using blending modes. Blending modes let you vary the ways in
which the colors of stacked objects blend.
1
Select one or more objects or a group.
2
Do one of the following:
• In the Effects panel, choose a blending mode, such as Normal or Overlay, from the menu.