/mark and /m
Makes the selected object appear in the important section of the contacts and
have an arrow on the side of the screen, as well as have > and < on the sides
of the selection box.
/unmark and /um
Unmarks the selected object marked with the /mark (/m) command.
/groupmark and /gm
Marks selected object for the entire group.
/groupunmark and /gum
Unmarks the selected object for the entire group.
/ignoregroupmarks <on|off>
Ignores marks from others in your group.
/automark <on|off> [radius in KM]
Automatically marks all ships in KM radius. Bots are marked automatically in the
range specified whether on or off. If you want to completely disable automarking,
set the radius to a number <= 0.