Keyboard shortcut to "untab" (move a block of code to the left) in eclipse / aptana?
In Visual Studio and most other half decent IDEs you can simply do SHIFT+TAB. It does the opposite of just TAB.
I would think and hope that the IDEs you mention support this as well.
Shift-tab outdents again :)
Here's where the standard shortcut keys are covered:
http://wiki.eclipse.org/User_Interface_Guidelines#Standard_Accelerators
You'll find many of the more esoteric ones here:
http://wiki.eclipse.org/FAQ_What_editor_keyboard_shortcuts_are_available%3F
Here is a general answer for untab :-
In Python IDLE :- Ctrl + [
In elipse :- Shitft + Tab
In Visual Studio :- Shift+ Tab