21EnglishManagementSettingECO Mode Choose "On" to dim the projector lamp which will lower powerconsumption, extend the lamp life and reduce noise. Choose "Off"to return normal mode.High Altitude Choose "On" to turn on High Altitude mode. Operate the fans atfull speed continuously to allow for proper high altitude cooling ofthe projector.Auto Shutdown The projector will automatically shutdown when there is no signalinput after the allocated time. (in minutes)Lamp Hour Elapse Displays the lamp’s elapsed operating time (in hours).Lamp Reminding Activate this function to display a reminder to change the lamp 30hours before its expected end-of-life.Lamp Hour Reset Press the button after choosing "Yes" to turn the lamp hourcounter to 0 hours.Menu Location Choose the menu location on the display screen.Source Lock When source lock is turned "off", the projector will search forother signals if the current input signal is lost. When source lock isturned "on", it will "lock" the current source channel unless youpress "Source" button on the remote control for the next channel.Startup Screen Use this function to select your desired startup screen. If youchange the setting, the changes will take effect when you exit theOSD menu.• Acer: The default startup screen of your Acer projector.• User: Use memorize picture from "Screen Capture" function.