MArker OFf [glist] Turn off the plotting of markers for all plot groups specified. If "[glist]" is omitted, then markers will be removed from all groups.
MArker Size # ON [glist] Changes the size of the markers when plotting the plot groups specified in "[glist]". The size can range from 0.0 to 5.0, where 1.0 is the default. Thus every plot group can have a different marker size.
MArker ? Draw a table of all the PGPLOT markers on your current graphics device.
PLT> MArk 19 ON 2 ! Use marker 19 when plotting group 2 PLT> MArk OFF 2 ! No longer plot group 2 with a marker PLT> MArk ON 2 ! Use default marker when plotting group 2 PLT> MArk ON ! Use markers when plotting all plot groups PLT> MArk Size 5 ! Plot markers 5 times larger than default size