Xcode 4 most useful shortcut keys [closed]

Answer 1

Here are a few commands I use to open / close different areas of the screen

Answer 2

Command + Control + Up alternates between .m and .h files.

Answer 3

Here you can find a nice overview of Xcode 4 shortcuts that you can print out:

http://cocoasamurai.blogspot.com/2011/03/xcode-4-keyboard-shortcuts-now.html