Acer XD1170 - Manual (Page 33)

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User Controls
Timer
(Computer / Video
Mode)
Timer Start
 Press the to start/stop timer.
Timer Period
 Press the to adjust timer period.
Timer Volume
 Choose this function to adjust volume when timer function is
enable and time is up.
Timer Display
 Press the to choose timer display mode on the screen.
Timer Location
 Choose the timer location on the screen.