“unset” clear non-global settings and zeros out global settings.
unset name [,selection [,state ]]
unset orthoscopic unset surface_color, 1hpv unset sphere_scale, elem C
If selection is not provided, unset changes the named global setting to a zero or off value.
If a selection is provided, then “unset” undefines per-object, per-state, or per-atom settings.