InFocus IN5104 - Manual (Page 23)

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Using the keypad buttons
power –turns the projector on (page 10) and off (page 15).
menu –opens the on-screen menus (page 27).
up/down arrows –navigates to and adjusts settings in the menus (page 27).
select –confirms choices made in the menus (page 27).
source –switches among active sources