Highlighting objects currently set to overprint increases the visibility of overprints in the PDF file, so that you can check and/or change the overprint status for objects more easily.
- On the lower toolbar in the Properties Editor/Viewer, click the Highlight objects set to overprint
All overprinted objects appear in the PDF in the highlight color that you selected when setting up PDF Trap Editor. button. - When ready, click the Highlight objects set to overprint button again to turn off the highlighting.