SYNOPSIS:
    VOL_TURN x|y|z|init degrees

DESCRIPTION:
    Turn the volume around its x, y or z axis, or re-initialize
    the volume to be aligned to the axis of the global coordinate
    system. If the mode is not "init", degrees is required and
    gives the number of degrees to turn.

SEE ALSO:
    VOL_OFFSET, VOL_SCALE, VOL_SET, VOL_TURN_INVIEW
