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

 disp-name

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

    o  A predefined display (SRC, OUT, PLOT, and PROMPT).

    o  A display previously created with the SET DISPLAY command

    o  A pseudo-display name: %CURDISP, %CURSCROLL, %NEXTDISP,
       %NEXTOUTPUT, %NEXTPLOT, %NEXTSCROLL, %NEXTSOURCE

    If you omit this parameter and do not specify a qualifier, you
    deselect 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 deselect the current
    display with that attribute (see the qualifier descriptions).