Resets

Control	Action
[BACKSPACE]	reset all adjustments to their defaults: audio sync, brightness, contrast, gamma, pan, rotation, saturation, speed, zoom
[1]	reset Speed to [1]00%
[2]   C	reset Contrast to normal
[3]   P	reset Pan to normal
[4]   R	reset Rotation to normal/not rotated
[0]	reset Brightness to normal
[']	reset Gamma to normal
[;]	reset Saturation to normal
[U]	[U]nzoom, i.e. re-fit the video to the window