stop picture from swinging 4

https://rjsfi8himm.clearminster.com/posts/how-to-choose-and-use-heavy-frame-hanging-wire-for-a-secure-level-display

If your framed picture keeps swaying every time someone walks by or you open a window, it's probably just not level on the nail. A quick fix is to move the hook slightly or use two nails for a wider support. You can also put a small piece of museum putty or adhesive pads on the bottom corners to grip the wall just enough to stop movement without damaging the paint.