Hello,
Can someone tell me, adding a custom Titlebar Button (like Maximize, Minimize, ...) is done in KWin or in the Window Decoration (Breeze, ...) settings.
I know, I can add or remove predefined buttons to the titlebar ins system settings, but I want my own button with it's own action.
Would this require changing the source of KWin or Window Decoration?

Background: I have a UHD monitor and the KWinscripts "kwin-rectangle" are very useful, maybe even a must on UHD. However I can't remember all the shortcuts.... Therefore I want to add a button that offers at least the windows positions that are the most important (for me).

Thanks,
Johannes