So, I have 2 monitors, and a panel with the whisker menu on each one. What I'd really like is for the shortcut that opens the menu to open the one on the active monitor (where the mouse is). Not sure how feasible this is, as you could have 10 panels on each monitor. Related: If I hold down the shortcut for longer than like a half second, when I release it, the other whisker menu opens and there's a grey box where it would normally be.
I don't think this is possible, sorry. I would recommend having only one Whisker Menu, and to add the "-p" command-line option to make it show up at your mouse cursor instead.