As I was working to migrate an application and its theme over to Application Express 3.1.2 from 2.1.2 I needed to move some images around and update the references accordingly. I remembered that the Application Builder has a feature to search through region source, which came in handy.
Here's where you can find it:
I could have used this type of feature to search through templates as well. If anyone from the APEX team is reading this...
