hotkeys:
M+I:rotate joint x-
M+K:rotate joint x+
M+J:rotate joint y-
M+L:rotate joint y+
M+U:rotate joint z-
M+O:rotate joint z+
M+C:reset joint rotation
N+J:move model x+
N+L:move model x-
N+I:move model y+
N+K:move model y-
N+U:move model z+
N+O:move model z-
N+C:reset model position
B+I:joint number -1
B+K:joint number +1
B+J:switch to side 1p
B+L:switch to side 2p