LG CineBeam Laser 4K HU85LA Owner's Manual page 29

Focus of the Screen Image
When an image appears on the screen, check if it is in focus and fits the screen
properly.
1
Press (Edge Adjustment) button on the remote control to execute the
[Edge Adjustment] function.
2
Move the projector to the left or right to check that the projection fits on the
screen.
29