Samsung 400Pn, 400P Owner's Manual page 37

1. Fix the product to the wall bracket.
2. Hold the product at the top in the center and pull it forward
(direction of the arrow) to adjust the angle.
3. You can adjust the bracket angle between -2°and 15 °.
Make sure to use the top center, and not the
leftor the right side of the product to adjust the
angle.