[Inkscape-user] alt key on OS X

The alt key doesn't seem to be usable on XQuartz.

I am trying to alt+click to select an object below a current one.

Unfortunately that doesn't seem to work, is there any way to overcome this?

OS X: 10.5.4 X11: 2.3.0 Inkscape: 0.46

X11 Settings -> Input:

Follow System Keyboard Layout: True Enable Key Equivalents Under X11: True