Assign Lamy button to some other key

[giorgio-arena]

Hello and thank you for this amazing piece of software :)

I'm using it on RM2 using evdev to allow me to use the button on my Lamy pen (actually a Samsung Tab S6 pen but it shouldn't matter). The problem I'm experiencing is that since I want to use it for collaborative whiteboarding, some of the platforms available have shortcuts for the rubber tool, but never mapped to the middle mouse as the tool wants. Often times this shortcut can be changed to some other key in the keyboard, but not to the middle mouse.

Is it possible to bind the Lamy button to some other key rather than the middle mouse button? And if so, is there any reference on how to achieve that?

Thanks!