Alright, an oddball one: I've opened a file in InDesign that was previously done on another computer. However, I don't have all the fonts installed that were initially used in it, so some text has defaulted. What I want to know, though, is what it has defaulted TO, because it actually looks kind of nice, minus the pink background behind it. It's not Minion, either, which is what my freshly-opened text boxes default to.
InDesign uses Myriad Pro as the substitution font for unopened text. Unlike the default font for an empty text frame which you can change—with no document open go through Type>Font>(Choose a font) then open a new document and the chosen font will become the new default—as far as I've ever been able to find out, you can't change the substitution font from Myriad.