Hold the picture against the wall at the height you want it to hang.
How to hang pictures on a plasterboard wall.
The ideal solution for hanging pictures on plaster is to use a picture hanging system like the all in one click rail cable hanging kit.
Lay the picture frame face down on a table and place a strip of painters tape or masking tape across the frame just above the eyelet screws.
Place a hook on the rail directly above the center mark.
Soak a non abrasive washcloth in warm water then place a bead of mild soap on the cloth.
If you are hanging small pictures on the wall the easiest way to accomplish the task is to use small nails.
This system works by simply installing a rail along the wall and pictures then hang from cables attached to the rail and are fastened with hooks.
Instead hammer the nail at a 45 degree angle for best results.
Mark the spot on the wall above the center of the frame.
Scrub gently using a circular motion.
Work the soap into a small patch of suds on the cloth.