All bathtubs have a drain overflow to prevent accidentally overfilling the tub. Most overflow covers have two screws on the front attaching the cover to a flange on the drain pipe. Some overflow covers, however, do not have any visible screws. This type of cover is normally found on tubs with lift-and-turn stoppers. Remove the cover plate on a bathtub drain overflow with no hole in the faceplate by unscrewing it from the pipe threads.
Feel under the bottom edge of the faceplate for a small set screw. Some overflow faceplates use a screw to help secure the plate to the outside rim of the overflow pipe.
Remove the screw with a Phillips-head screwdriver or Allen wrench, depending on the type of head.
Grasp the outside of the faceplate with your fingers and turn counterclockwise. The faceplate screws onto threads on the overflow pipe.
Continue turning the faceplate counterclockwise until it comes completely off the overflow pipe.