BenQ XL2540 User Manual page 19

And then detach the base from the stand.
Please handle the base carefully. Avoid to take the base from
the adjustment scale, it may cause the damage.
Lock
Open
Lock
Open
3. Remove the monitor stand.
While pressing and holding the VESA mount
release button ( ), detach the stand from the
3
2
1
monitor ( and ).
How to assemble your monitor hardware 19