Acer PD126D series - Manual (Page 27)

... English 25
User Controls
Management
(Computer / Video
Mode)
ECO Mode
Choose “On” to dim the projector lamp which will lower power
consumption, extend the lamp life and reduce noise. Choose ”Off” to
return normal mode.
Auto Shutdown
The projector will auto shutdown while there is no signal input after
the setting time.
Source Lock
When source lock is turned off, the projector will search for other
signals if the current input signal is lost. When source lock is
turned on, it will “Lock” the current source channel before you
press “Source” button on remote control for next channel.
Menu Location
Choose the Menu location on the display screen.