SET

        [GREG1\]SET Argument [Value [...]] [/DEFAULT]

    Specify or reset some default value for a parameter used by GreG.  These
    values may sometimes be overridden for a single command by the appropri-
    ate option (e.g. /BLANKING and SET BLANKING).  SET Argument /DEFAULT re-
    set the default values for the given key.

    SET /DEFAULT  reset all default values of SET including the FONT and the
    PLOT_PAGE ; thus the plot cleared. Use PENCIL /DEFAULT to reset the PEN-
    CIL definitions, and TICKSPACE 0 0 0 0 to reset tick spacing parameters.

    You can use GREG1\SHOW to see the current value of one or all items.