If there’s transparency on a particular page, it will be highlighted with the familiar gray checkerboard Transparency Grid in the Pages palette. However, sometimes you can look long and hard at a page and not find any transparent effects, or transparency that’s been applied in the Transparency palette – no changes in opacity or Blending Mode. So why does the Pages palette indicate that this one page contains Transparency?
What is being missed? I like to call it “Back Door Transparency” – transparency in placed images from layered Photoshop images and Adobe Illustrator graphics. If the image has any transparency, it’s still transparent in InDesign. The Pages palette doesn’t lie.
Tip provided by Jeff Witchel, Certified Adobe® Training Provider.