Syntax:  restrict {<expression>}

The RasMol restrict command both defines the currently selected region of the molecule and disables the representation of (most of) those parts of the molecule no longer selected. All subsequent RasMol commands that modify a molecule's colour or representation effect only the currently selected region. The parameter of a restrict command is a RasMol atom expression that is evaluated for every atom of the current molecule. This command is very similar to the RasMol select command, except restrict disables the wireframe, spacefill and backbone representations in the non-selected region.

Type "help expression" for more information on RasMol atom expressions.