BenQ XL2411T User Manual page 9

Carefully lift the monitor, turn it over and place it
upright on its stand on a flat even surface.
Extend the stand to the maximum extended
position. And rotate the monitor 90 degrees
counterclockwise as illustrated.
You might want to adjust the monitor stand height.
See Adjusting the monitor height on page 13 for
more information.
You should position the monitor and angle the screen to
minimize unwanted reflections from other light sources.
How to assemble your monitor hardware 9