Necessary materials: non-marking hooks, hammer, level
1. Choose the appropriate non-marking hook and find the location where you need to hang the painting;
2 . Nail one leg of the traceless hook into the wall first to facilitate fixation, and then nail into the other three remaining corners;
3. The picture below shows how it will look when it is fully inserted. It is thin, and the traces on the wall when removing the nails are relatively small;
4. Hang a heavy object and test whether the hook is firmly fixed;
5. Use it on the other corner Nail the traceless hooks in the same way, and use a level to ensure they are installed level.