Is there any keyboard shortcut to switch to the project navigator, select a file and then edit the file? I use shortcuts for switching between tabs etc and I find it troublesome to use the mouse to choose a new file in the project navigator and then click the main area again to start editing it.. Thanks!
I hope I understand what you're asking:
Command - Option - ~ (Tilde)
This will navigate through areas you have open in Xcode. If you only have the project view and editor open, this should bounce between the two.