LG SQ780S-W 31.5" 4K Smart Monitor with webOS and Ergo Stand - Manual (Page 9)

9
Leveling the Screen
If the screen appears crooked to one side after the product has been placed in position, straighten the angle horizontally as follows.
Adjusting the Stand Height
1 Make sure to hold and move the monitor with both hands.
Max. 130.0 mm
(5.1 inches)
• To avoid injury when adjusting the height, do not put your hands on the stand.