Revealing All Tracking and Kerning in Text
Editor's note: This little nugget was originally an InDesign Magazine Tip of the Week, but since it's not documented anywhere that we could find, it is the very definition of an InDesign "secret," and thus must be shared here too. By the way, sign up now to receive the Tip of the Week, so you don't have to go looking for cool tips—they come to you!
Ever receive a document and the text looks suspiciously squished in certain places? Suspect some rogue tracking has taken place?
You can instantly reveal all tracking and kerning by going to Composition Preferences and choosing Highlight Custom Tracking/Kerning.
Manually applied tracking and kerning appears in dark green. That's not news (though it can be handy).
Tracking applied as part of a paragraph or character style appears in light green. This is the newer feature that's undocumented—and very cool since it allows you to ignore tracking and kerning that were applied with styles, and are presumably to spec. It works at least as far back as CS6.
Update: Be sure to check out the comments below for a great little script that you can use to toggle this preference on and off with a keyboard shortcut of your choosing!