You can decide the layout according to the style and size of the personalized frames for graduation. If you have a series of photos of the same size, you can put them together to show the relationship between the photos. The standard distance is 2 to 2.5 inches. If you have more photos, the standard distance is 3 to 4 inches.
Another suggestion is to put a big picture or a mirror in the middle and a small picture next to it.
The overall picture layout should be balanced. At least visually evenly distributed. If not evenly distributed, it will appear uncoordinated, heavy head and light foot.
Hang on the average height of the person's eyes can see the place. The standard distance is 60 feet from the ground. If you are still uncertain, put personalized frames for graduation higher so that more people can see the photos. The suggestion is not to put it too low.
If you want to hang something over a sofa or furniture, it is recommended that the distance between the two items should be no less than 6 feet. If the distance between the two items is too wide, people will focus on the wall, not the photos.