The normal version of QDP uses the so called native mode PGPLOT. This is faster than the normal Starlink version but there are annoying differences in device names for users of the regular version. On UNIX, the list of devices is as follows.
/GF GraphOn Tek terminal emulator /NULL Null device, no output /PS PostScript file, landscape orientation /RETRO Retrographics VT640 Tek emulator /TEK4010 Tektronix 4010 terminal /TK4100 /VPS PostScript file, portrait orientation /VT125 DEC VT125 and other REGIS terminals /XDISP pgdisp or figdisp server /XTERM XTERM Tek terminal emulator /XWINDOW Window on Xwindow server