I use InDesign as part of the DTI suite of newspaper production apps. I jump from ID to AI to Photoshop a lot. It seems to me that previously I was able to work in AI (or another app), then click on ANY part of the ID window to make it active again. Now the only area of the ID window that reactivates it is the grey bar at the top of the window. Id like to have that feature working again. I know I can switch apps with command-tab, but I'm an artist, so my hands aren't hovering over the keyboard all the time. Any thoughts?
From context, it appears you are on a Mac. Try experimenting with turning on/off the Application Frame under the Window menu.
If that doesn't work, try restoring your preferences:
Buy a mouse or something, with the button which can be coded, and give the function COMMAND-TAB to the button .