Elecom Deft Pro Trackball
Reorder buttons to my preference.
Listing 1: /etc/X11/xorg.conf.d/50-elecom​_deft​_pro.conf
Section "InputClass" Identifier "Elecom Remap" MatchProduct "ELECOM TrackBall Mouse DEFT Pro TrackBall" Option "ButtonMapping" "1 12 2 4 5 6 7 8 9 10 3 11" EndSection