NDF_NOACC( ACCESS, INDF, STATUS )
-- Disable a specified type of access to an NDF
NDF_SBND( NDIM, LBND, UBND, INDF, STATUS )
-- Set new pixel-index bounds for an NDF
NDF_SHIFT( NSHIFT, SHIFT, INDF, STATUS )
-- Apply pixel-index shifts to an NDF