ManualPlacement with mouse button > 3

I have a multi button mouse.

Wanted behavior:
Clicking anywhere on a window with the thumb button (mouse button 6) to
pick that window up for ManualPlacement. Moving the pointer to a new
location and then clicking the thumb button again to put the window down.

In my config file, I have the following:

Mouse 6 A A Move

This is working, exept that pressing mouse button 6 a second time aborts
the move instead of placing the window.

I suspect the solution requires me to edit the fvwm source code. But I am
not sure where in the source this lives.

What you’re looking for is similar to ‘PlacedByButton3’, but using Button6, instead. I’ll look into this for you, later.

– Thomas Adam