That takes the pressure off you. They include the graduate holding the diploma and the proud parents holding the graduate. Holding and hugging also applies to extended family. Don't forget brothers and sisters, as many will be competing for attention and taking pictures of them may satisfy their need for attention. Use the flash outdoors.
Bright sun means deep shadows that often seem to mar expressions and features.
So turn on the flash and get within a few steps of your subject, so the flash has enough power to lighten those harsh shadows. By using the flash outdoors, you lighten harsh shadows and create much more pleasing photos of people. Pass the mortar board and take a picture. Everybody seems to love the ceremonial cap. Once the action dies down, put it to good use.