[solved] camera tumbling and 'alt-mouse' bindings...

This is driving me bananas... anyone know which keyboard bindings need to be disabled to permit normal camera tumbling with alt-mouse controls?

I'm fairly new to Linux.. but really want to give this a go.

I've installed Mint 17.2 and just installed Unity.. so far things seem nice, but this camera control is making me pull hair.

[SOLVED]
lol... well, still figuring my way around linux, but I installed dconf-editor and logged out, and "then" was able to change the properties for mouse-button-modifier
(found under: org > cinnamon > desktop > wm )

incase anyone else runs into that whom are'nt linux familar like me.