Anchors are available with hooks to hang pictures and with special hooks to hang mirrors.
Hanging pictures on walls nails or screws.
Drive in the metal screw and hang the picture.
When hanging a picture between studs use a hollow wall anchor such as a toggle bolt.
This includes nails screws wires keyhole or sawtooth fasteners or anything else that could make the back surface of the picture uneven.
Plaster walls have a tendency to crack and crumble if you attempt to hammer a nail directly into the wall.
Adhesive picture hooks are the best way to prevent damage when hanging a picture but pre drilling the hole will usually prevent cracks and chips from forming as well.
Then screw the anchor into the wall with a standard screwdriver.
If you want to hang a group of pictures for a gallery wall hang the center of the grouping at 57 inches.
With groupings the largest frame is usually best in the center or at the center bottom.
In addition the screw must go through the drywall and into a stud.
If you hang a heavy picture on a screw that is only supported by drywall it is likely to pull out of the drywall and crash to the floor.
Drive the pointed end into the drywall with a hammer.
Generally screws provide more holding power than nails so they re better for hanging large heavy pictures.
For hanging heavy paintings artworks and other objects from walls you should definitely use a screw rather than a nail.