The (optional) polarised mask is supplied with adhesive discs on the back surface. Peel the backing off the discs and then carefully position the mask on the left hand edge of the display abutting the left bezel.  The mask is designed to be used with 24’’ wide-screen monitors and should fit exactly between the upper and lower bezels. Once attached, the mask should not be removed.

24'' monitor with polarised mask attached


See also:


Aligning Stimuli with polarised Mask