Sony PCV-L620 - Manual (Page 15)

Locating Controls and Connectors 11
To adjust the height and viewing angle of the display
Holding both sides of the display, push the display panel out and up, and
then adjust the viewing angle.
Set the display height so that it does not touch the keyboard, and adjust
the viewing angle approximately 27 degrees from eye level to the center
of the screen.
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The LCD display is designed to maintain the best ergonomic viewing angle.