Library /sys$common/syshlp/dbg$help.hlb DEBUG, SELECT, Parameters  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 display-name

    Specifies the display to be selected. You can specify any one
    of the following, with the restrictions noted in the qualifier
    descriptions:

    o  A predefined display:

          SRC
          OUT
          PROMPT
          INST
          REG
          FREG (Alpha only)
          IREG

    o  A display previously created with the DISPLAY command

    o  A display built-in symbol:

          %CURDISP
          %CURSCROLL
          %NEXTDISP
          %NEXTINST
          %NEXTOUTPUT
          %NEXTSCROLL
          %NEXTSOURCE

    If you omit this parameter and do not specify a qualifier, you
    "unselect" the current scrolling display (no display then has the
    scrolling attribute). If you omit this parameter but specify a
    qualifier (/INPUT, /SOURCE, and so on), you unselect the current
    display with that attribute (see the qualifier descriptions).