/ callbacks lx:{L j+x} / left right ux:{M i+x,0} …

/ callbacks
lx:{L j+x} / left right
ux:{M i+x,0} / up down
hx:{M i+d*x} / home end
mx:{M s+_x%F} / mouse
px:{S s+w*x} / page up down
wx:{S s+4*x} / wheel up down