Xcode 4 - key binding option key, possible for you?

In xcode 4, I can't bind the command "Shift Right" to option+tab key and "Shift left" to option+shift+tab. I'm using textmate and those commands are binded like this, so I would like the same setup in xcode 4... But for some reason, it adds the command key in my bind! so option+tab is replaced by option+command+tab.

A quick fix that I found was to overwrite the bind in the system preferences, but was wondering why Xcode won't let me use my bind?

Solution

Only the developers can say for sure, but it likely has to do with the many meanings of the Tab key:

generates a tab character
used with command to switch between applications
iterates over controls in windows and dialog boxes
iterates over links in web browser

I think I missed a couple, too. Due to its size and position, the Tab key is a hot commodity. The specific combination you want to use probably conflicts with an established or planned use of Tab.