Hi, I have been using a Logitech Marble Mouse trackball and a Logitech optical mouse with Leap 15.2/KDE for quite a while. Trackball left-hand-mapping, and an optical mouse right-hand-mapping (one computer, two users) I left the the optical-mouse-setting as it came with the system, and added for the trackball the configuration below. Works the way I like it. /etc/X11/xorg.conf.d/40-libinput.conf in Leap 15.2/KDE-Plasma ---------------------------------------------------------------- Section "InputClass" Identifier "Marble Mouse" MatchProduct "Logitech USB Trackball" MatchDevicePath "/dev/input/event*" Driver "libinput" # default button assignments. # Option "ButtonMapping" "1 2 3 4 5 6 7 8 9" # right-hand-mapping # Option "ButtonMapping" "1 8 3 4 5 6 7 2 9" # left-hand-mapping Option "ButtonMapping" "3 8 1 4 5 6 7 2 9" Option "ScrollMethod" "button" # Option "ScrollButton" "8" Option "ScrollButton" "9" # Option "MiddleEmulation" "on" # use instead Buttonmapping "3 8 1 ... 9" EndSection ---------------------------------------------------------------- But not so with Leap 15.3 RC Gnome or with the current Tumbleweed XFCE. It seems that /etc/X11/xorg.conf.d/ is not used except for a keyboard-configuration file in Tumbleweed XFCE. It is still there in Leap 15.3 RC KDE-Plasma. How could I get the trackball functionality in Tumbleweed XFCE? Peter