Simulate spot ink overprinting

Last updated on Jun 2, 2026

Learn how to use overprint simulation to preview how spot inks with different neutral density values interact during composite printing in Adobe InDesign.

Overprint simulation helps you preview how spot inks interact when they overlap, such as red and blue combining into a third color. It applies only to composite output like PDFs or desktop printers and works by converting spot colors to process equivalents. Since this changes how colors are output, never use overprint simulation for RIP‑based separations.

Select File > Print.

In the Print dialog box, select Output from the list on the left.

From the Color menu, select a composite option such as Composite RGB or Composite CMYK.

Select the Simulate Overprint checkbox. You cannot simulate overprinting when Composite Leave Unchanged is selected in the Color dropdown menu.

Configure any additional print settings, then select Print.

The printed output or exported PDF will show how overlapping spot colors visually interact. If the simulated result doesn't match your design intent, you can adjust your overprint settings using the Attributes panel (Window > Output > Attributes) before finalizing your print-ready files.

For an on-screen preview of overprinting effects without printing, use either the Overprint Preview menu (View > Overprint Preview) or the Separations Preview panel (Window > Output > Separations Preview). This panel allows you to isolate individual ink plates and preview how they interact, including transparent areas where varnishes or coatings are applied.