Is it possible to write a script that changes the navigations keys? So I can pan with alt+shift+click and zoom with alt+ctrl+click ?

And one other thing, this maybe is in the wrong section. But this is rally bugging me. Sometimes when I've zoomed in and out much i a view port for example the top view. Why all sudden gets all gray? Even tho I hit both "a" and "f" to fit the view port.

The only way I've been able to solve this is to create a new top view. Is there any other solution?

Thanks!