Did you know you can use craft paper to design your gallery wall? Trace all your picture frames on craft paper and then cut them out. Use painters tape to attach your paper frames to the wall. You will be able to move the paper frames around on the wall until you find the perfect layout. By using craft paper and painters tape you won't have to worry about marking up the wall. Once you have found your layout, start hanging the real frames, removing the craft paper as you go.