Select a spot on the wall. Select a spot around the most dramatic large piece, which will draw the eyes to the smaller frame as well. Alternatively, group familial photos together.
Measure the length of the frame and divide the number in half to find the center of the back of the frame. Add 1 inch to 2 inches to the calculation; this depends on how much space you want to have between preexisting wall photos, if applicable.
Measure the calculated length on the wall at the desired height and draw a mark with a pencil. Place the nail on the mark and hammer in the nail, leaving 1/4 inch of the nail out of the hole. Insert the nail into the hole on the back of the frame and adjust the frame to make sure it is even.