Though Photoshop doesn't directly open InDesign project files, the two programs are closely related. Both are part of Adobe's Creative Suite 6 package, so the programs share common file formats.

Here's a frustrating problem: You have InDesign CS4, and your buddy needs your file, but has InDesign CS2. "Easy!" you think, "just save an InDesign Interchange (INX) file and send it to him." Lo, ...