Kensington Expert Mouse Trackball vs X Server 1.8

After the fuffing and fawing required to get the Wacom tablet up to speed, swapping the buttons on the Kensington trackball required just one stanza in /etc/X11/xorg.conf.

To wit:

Section "InputClass"
Identifier      "Kensington Trackball"
MatchProduct    "Kensington Expert Mouse"
Option          "SendCoreEvents" "True"
Option          "ButtonMapping" "3 8 1 4 5 6 7 2"

For some no-doubt logical reason, it Just Works without an InputDevice stanza or anything in ServerLayout.

That will swap the buttons on any matching trackball, should I be so bold as to plug more than one in at a time …

The old FDI file is there.