keyword-list
    Indicates the modes to be set or reset. The mode keywords and
    their effects are as follows:

 BELL=NONE or ALL or [NO]BROADCAST
    Specifies which new messages should be accompanied by a
    warning bell character. By default, only broadcast messages are
    accompanied by a warning bell.

 KEYPAD=EDT or EVE
    Specifies whether the key definitions should be similar to EDT or
    EVE. Note that EVE key definitions do not use the numeric keypad
    on VT200 terminals; numeric keypads on VT200-series terminals
    emulate EDT key definitions regardless of the keypad mode you
    choose.

 MENU=[NO]GRAPHICS
    Lets you choose between graphic characters and nongraphic
    characters in the display of a menu. The initial setting is
    MENU=GRAPHICS. If the terminal characteristics do not include
    DEC_CRT, then LSE uses nongraphic characters regardless of the
    setting of this mode.

    Graphic characters currently require more screen repainting
    than do nongraphic characters, so you may want to use SET MODE
    MENU=NOGRAPHICS if you are working at a low baud rate.

 [NO]PENDING_DELETE
    Specifies whether a selection in a user buffer should be deleted
    when the user inserts text. The initial setting is NOPENDING_
    DELETE. PENDING_DELETE is disabled for a selection made with
    SELECT ALL. You can use the UNERASE SELECTION command to restore
    deleted text.

 TABS=[NO]VISIBLE
    Specifies whether tabs should appear as blanks, or a combination
    of the HT (horizontal tab) symbol and dots ("HT......").

 TABS=[NO]HARD
    Specifies whether tab or blank characters are used for
    tabulation.

 UNDO=ON or OFF
    Specifies whether or not UNDO processing is enabled.