How do I make sure the projection surface is flat enough for finger touch interactivity?
Make sure the curvature of the projection surface is no more than 0.2 inch (5 mm). See Epson BrightLink Procedure for Measuring Projection Surface Flatness for instructions. Finger touch interactivity may not function properly if the curvature is greater than 0.2 inch (5 mm).
You can also watch our helpful video on YouTube to see a demonstration of how to check the flatness of the projection surface.