Hanging a group of pictures can be tough and usually requires a little trial and error before you get it right. Interior decorating blog Roost suggests you lay out the pictures on a piece of wax paper beforehand so you can hang them exactly how you want without worrying about where the hanger is.
Start by laying out the frames on the ground and arranging them however you like. Flip them over and place a large sheet of wax paper over them. Trace the outline of each hanger on the wax paper, then tape the wax paper to the wall. Hammer in your nails where you outlined the hangers and you're good to go. It's similar to the tracing method we've talked about before but a lot less labour intensive. It should be especially handy if you have a lot of frames with hangers in different areas.