I want to record my Desktop and use zoom function. I changed Zoom in shortcut to <super>button5 and when I click Windows logo and scroll my mouse, it doesn't work. What I am doing wrong?
XServer interprets scrollwheel as extra mouse buttons; in Compiz, it's Button4 for Wheel Up and Button5 for Wheel Down - more details in Compiz wiki. This is for Compiz in Ubuntu 11.04, 11.10 may differ (although I doubt it).
I assume you have set up the shortcut using CompizConfig Settings Manager (ccsm).
First make sure you have actually enabled the plugin you want to use for zooming.
Also, as lgarzo suggests, try setting a different, non-conflict shortcut, possibly without a Super key - this key is a bit overloaded in Unity and sometimes just doesn't work for custom shortcuts.
EDIT: The problem was that Compiz wasn't actually running (see the comments below). Otherwise there's nothing wrong with Compiz zoom plugin.
