XBMC4Xbox

You can configure a button to do this - look in system/keymaps

Okay thanks, I'll give it a try.

This should be as standard keymap in xbmc (I didnt change settings just added to buttons):

gamepad.xml:
<MyVideoLibrary>
<gamepad>
<black>Delete</black>
<start>ToggleWatched</start>
<X>Info</X>
</gamepad>
</MyVideoLibrary>

I disagree - by default X switches between fullscreen - these files are meant to be customised, but I don't want to change the default controls behaviour. BTW you need to provide diffs against if wanting to contribute as mentioned before.

Ah yes, of course I forgot this overwrites the globals :\
The black button has no global value. The value set in MyVideoLibrary is Delete a movie from database.
This one is used very(!) rarely so I would say <black>Info</black>
If start is here possible I would like to see <start>ToggleWatched</start> because this is much more often used than Delete.

If you agree to first or both (black, black and start) I would make a patch file but these tools are on my other pc...

I am reluctant to change default functionality for buttons that are already assigned as people will complain. Why not just keep a customised keymap for yourself ? That's what it is for - you can keep your custom keymap in userdata/keymaps etc. Feel free to ask on the forum for user opinions - it might sway me, but for now I am not keen on making these changes, especially at this stage in the development (there will be no more release candidates before the final release)