LG -H870U User Manual page 425

Other useful features in the Camera app
AE/AF lock
You can fix the current exposure level and focus position by touching and
holding the screen in the AUTO mode. To turn off the feature, tap a blank
area on the screen.
Focus peaking
In the MANUAL camera or MANUAL video mode, tap FOCUS.
To turn off the feature, tap Focus peaking.
Useful Apps
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