Alt + Right Mouse Button resizes the window in KDE, but I need to customize the combination Alt + Right Mouse Button for a 3D application. However, KDE's Control Center > Regional & Accesibility > Keyboard Shortcuts doesn't register the mouse buttons when customizing the keys.
wiki.kde.org describes
Alt + Left Mouse Button: Move window freely around
Alt + Mouse Wheel: Scrolls horizontally instead of vertically
but doesn't explain how to customize the combinations.
How can I do it?