Hi Frank,
Just a note: Alt-click in Gnome-Metacity, KDE and the blackbox window manager is used to move a window around.
Yes, Tim Blechmann already pointed me to this, but there's still a bug in PD making all the modifiers except Alt unusable (and not using any modifiers seemed a bit too dangerous to me). In the future when my patch
https://sourceforge.net/tracker/?func=detail&atid=478072&aid=1248135...
is finally incorporated, i'd like to switch to ctrl-click.
all the best, Thomas