CTRL-Q or CTRL-A : increase, decrease sample size

CTRL-W or CTRL-S : increase, decrease throttle time (sleep time before requesting each sample. i use it to show the incremental nature a bit better)

CTRL-E or CTRL-D : increase, decrease nr of x bins

CTRL-R or CTRL-F : increase, decrease nr of y bins

CTRL-P: show pen and fingers