NEC MultiSync LCD1510 Mode D'emploi page 29

E - 14 Installation
Screen Rotation
Before rotating, the screen must be raised to the highest level to avoid
knocking the screen on the desk or pinching your fingers.
To raise the screen, place hands on each side of the monitor and lift up
(Figure R.1).
To rotate screen, place hands on each side of the monitor screen and
turn clockwise from Landscape to Portrait or counter-clockwise from
Portrait to Landscape (Figure R.2).
To toggle the orientation of the OSM menu between Landscape and
Portrait modes, press the RESET button while OSM menu is off.
Tilt and Swivel
Grasp both sides of the monitor screen with your hands and adjust the
tilt and swivel as desired (Figure TS.1).