[Inkscape-user] Disabling alt+click alt+drag in linux (Selection Under)

Hello,

I wanted to get Selection Under working, but alt+click seems to be grabbed by my window manager to drag the window.

I am running fluxbox under SuSE9.1 linux. I tried to google disabling alt+click and alt+drag under linux, but I haven't found any relevant page that tells me how to do so.

Thanks,

-frankie