Don't change mode after it has been started once. It will crash, it is a "feature"..
-1 = enable (without visual mode)
-2 and -3: visual mode
v <vpos> [<hpos>] = show detailed cycle usage of line <vpos>. hpos is optional. (also don't use invalid vpos or hpos, it probably will crash too..)
Colors are described in some change log entry. Too lazy to find it
