zto(x,speed) zooms camera to particular setting (how many discrete zoom levels are there?) [BA]
zby(x,speed) zooms camera by some +/- delta amount [BA]
Added:
> >
ssel(cam) select a particular camera (zoom-command above would affects only the currrent camera) [II]
maf(on|off) multiple cameras auto-focus on/off [II]
msnap multiple cameras snapshot [II]