Torsion

DESCRIPTION

   "torsion" rotates the torsion on the bond currently
  picked for editing.  The rotated fragment will correspond
  to the first atom specified when picking the bond (or the
  nearest atom, if picked using the mouse).

USAGE

   torsion angle

PYMOL API

    cmd.torsion( float angle )

SEE ALSO

   Cmd edit, Cmd unpick, Cmd remove_picked, Cmd cycle_valence