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5. Ensure that the four sides of the screen are aligned with the outer edge of the frame. The M4 × 45 pull nail screw
(L) is screwed into the Pull pin nut (K) in pull rod through the hole in the inner frame hole. Install the four corners
first according to the installation sequence of 1-1 → 2-2 → 3-3 → 4-4 in the illustration, first the long side and then
the short side. Pre tighten the screws to ensure that the four sides of the screen are aligned, and then tighten the
screws symmetrically. The frame screws can be tightened to the side of the pull rod and close to the positioning line.
If the screen surface is not flat, adjust the tension of the pull screws until the screen surface is flat.
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