Help Button - NEC REMOTE MT40 Manual

HELP button

Press this when nothing is selected to display the help menu.
When pressed while the help menu is displayed, the
description of the help function is displayed. When press
while menus or adjustment/setting screens are displayed,
help on that subject is displayed.
When this button is pressed, the COMPUTER/PJ SELECT
button automatically lights red and the mouse buttons are set
to the projector mode.