Optoma LR4 - Manual (Page 15)

LR4 User Manual Chapter 2 LR4 Menu Display 11
2.2.4 TIMER
Press the Power/Mode button until TIMER is highlighted on the OSD.
Enter TIMER to set and start a countdown from a maximum of 24
hours using HH:MM:SS.
Press SET to start the timer and edit that value or press START
to exit timer if countdown function is not needed.
Press the plus(+)/minus(-) sign to increase/decrease the
highlighted number.
Press the left/right arrow to highlight the desired number to
change.
Press SET to stop the timer and edit that value.
Press START to begin the countdown.
Add
Decrease
TAB TAB ALT ALT