BenQ GL950M User Manual page 10

If the screen size is 27 inches, follow the illustrations on the
right to attach the monitor stand and the base. Tighten the
screw that fixes the stand to the monitor. Use of a flat-head
screwdriver is recommended.
Gently attempt to pull them back apart to check that
they have properly engaged.
You should position the monitor and angle the screen to
minimize unwanted reflections from other light sources.
10 How to assemble your monitor hardware
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