The SET TERMINAL command enables you to define the portion of
    the screen that the debugger has available for formatting screen
    output.

    This command is useful with VT100-, VT200-, or VT300-series
    terminals, where you can set the screen width to typically 80 or
    132 columns. It is also useful with workstations, where you can
    modify the size of the terminal-emulator window that the debugger
    uses.

    You must specify at least one qualifier. You can specify all. The
    /PAGE and /WIDTH qualifiers each require a value.

    When you enter the SET TERMINAL command, all display window
    definitions are automatically adjusted to reflect the new screen
    dimensions. For example, RH1 changes dimensions proportionally to
    remain in the top right half of the screen.

    Similarly, all "dynamic" display windows are automatically
    adjusted to maintain their relative proportions. Note that
    all display windows are dynamic unless referenced with the
    DISPLAY/NODYNAMIC command. In that case, the display window
    retains its current dimensions after subsequent SET TERMINAL
    commands. However, you can use the DISPLAY command to reconfigure
    the display window (you can also use keypad-key combinations,
    such as BLUE-MINUS, to enter predefined DISPLAY commands).

    Related commands:

       DISPLAY/[NO]DYNAMIC
       EXPAND
       (SET,SHOW,CANCEL) WINDOW
       SHOW TERMINAL