Great that KDE Plasma supports graphics displays or graphics tablets, there is also the section where you can map the pen buttons, great; what is missing is the ability to map the display buttons or graphics tablets like these Artist 12 Pro Portable fully laminated Pen display | XPPen as you can see it has 8 buttons and a rotating bezel, it would be nice to be able to map from the kde settings! also because the official driver software gives me problems with the zoom.
I solved it more or less, I tried to customize the ring, but instead of using the keys I saw if turning it revealed to me what the rotation was pointing to, one side to “Ctrl++” and the other to “Ctrl+'”, but if I try to customize with “Ctrl++” and “Ctrl±” it only gives me the zoom which works (it doesn’t zoom out) and so I changed the shortcut to Krita to Ctrl+’ and Ctrl++, now everything works; it’s a problem of shortcut mappings at least for the Italian keyboard.