Examples

   > GMULTI NEW ds1 ds2 ds3 OUT=mds \     - form new multiple dataset
                                            from three inputs
   > GMULTI APP ds4 INOUT=mds             - add another dataset
   > GMULTI LAY NX=1 NY=4 INOUT=mds       - arrange plots on top of
                                            each other
   > GMULTI COM PLOT=1 BASE=1 OVLY=2,4    - overlay NDFs 2 and 4 over
                                            base plot 1
   > GMULTI COM PLOT=1 BASE=3 OVLY=*      - overlay all other NDFs in
                                            dataset over NDF 3
   > GMULTI COM PLOT=2 BASE=1 OVLY=3:5    - overlay 3 to 5 over 1
   > GMULTI SHO \                         - list contents and plot
                                            arrangements