Pressing General / Tones/display / Backlight.
activates the backlight. You can change the backlight behavior in the watch settings underKeeping General / Tones/display / Button lock.
locks and unlocks buttons. You can change the button lock behavior in the watch settings underSelect the Actions only button lock setting for sport modes to avoid accidentally starting or stopping your log. When the and buttons are locked, you can still activate the backlight by pressing , change between the displays by pressing and views by pressing .