Rear View with Buttons Buttons from right to left 1. 2. 3. 4. 5. M - This button activates the On Screen Display (OSD). While the OSD is active, this button will act as the select button to open up an option for adjustment. • - With the OSD turned on, this button moves the selection upwards. This button will also increase the value of an adjustment while an option is open. T - With the OSD turned on, this button moves the selection downwards.