“button” can be used to redefine what the mouse buttons do.
button button, modifier, action
button = left, middle, right, wheel, double_left, double_middle, double_right, single_left, single_middle, or single_right
modifiers = None, Shft, Ctrl, CtSh, CtAl, CtAl, CtAS,
actions = None, Rota, Move, MovZ, Slab, +Box, -Box, Clip, MovS, +/-, PkAt, Pk1, MvSZ, Sele, Orig, Menu, PkAt, Pk1 RotO, MovO, MvOZ, MovA, PkAt, PkTB, MvSZ MvAZ, DrgM, RotZ, PkBd, ClpN, ClpF
Changes made using the button command are easily overridden when the user iterates through the mouse modes. This behavior needs to be changed.
Obsolete actions: lb, mb, rb, +lb, +mb, +rb, +lbX, -lbX,
Unsupported, Internal, or Future Actions: RotD, MovD, MvDZ, RotF, MovF, MvFZ, TorF, RotV, MovV, MvVZ, DgMZ, DgRT