➢David Blatner has a good online article about InDesign's Preflight Panel.
When you open a large output file, you may see the preflight zone, at the bottom left of the InDesign main window, as Checking (ie. busy), as in the top image on the right.
As soon as the panel is ready, as shown in the second image on the right, click to open the preflight panel, and open the TEXT section (if any).
Topic 185430, last updated on 22-Apr-2022