InDesign’s Secret Component Information Dialog Box
Sometimes it’s helpful to get a glimpse into a document’s history. Fortunately, InDesign offers you all kinds of background data on your copy of InDesign and currently open document in the Component Information dialog box. To open this secret window, hold down the Command or Ctrl key while selecting About InDesign from the InDesign menu (Mac) or Help menu (Windows).

Component Info Dialog Box 3
Granted, the Component Information dialog box doesn’t tell you everything you may want to know (such as “who the heck messed this thing up, and were they raised by wolves?!”), but it just may help you out in a pinch.