You can do your own legend on a piece of paper printed in an inkjet, laser, etc., or we can screen print them for you in polycarbonate, so that the colors are exactly the same as the ones in your overlay. Those legends can be inserted through some specially designed slots. There are basically two types of designs, one that your insertions can be removed and replaced even if the membrane is installed, and the other where they cannot be removed once it's installed.