Rehearsals: To prepare for the handshake photo, I got the sixteen graduates together and introduced myself and congratulated them on their achievements. Next, I gave the both instructions and a demonstration of exactly how I wanted them to proceed. First, the would shake hands with the director (right hand, below) while accepting the diploma (left hand, above). Next, I told them to stand on a blue-tape X I had placed on the stage, about ten feet in front of where I would be standing. Finally, I told them to stay put until I gave them the thumbs up sign, a signal for them to return to their chairs on the stage.
Equipment: Since I had so little time between graduates, the equipment needed to produce consistent results. I mounted a speedlight on a seven-foot light stand for a key light and aligned it with the taped "X" I had place on the stage. I triggered the flash using a radio transmitter. Then I went and stood on the X, and made selfies until I was happy with the exposure. At the last minute, I decided to add a CTO gel onto the speedlight so I could use the same white balance preset when I photographed the speakers standing at the podium. With the gel in place, I reset my aperture to compensate for the light loss from the CTO gel. Finally (here's the genius part) I wrote down my final exposure settings (ISO, aperture, speedlight output) on a small card and taped it to the lightstand. This way I could effortless duplicate the setting when the graduates walked off the stage.
I knew that when I returned to my usual aisle position on the floor, I'd be changing ISO, aperture size, and exposure duration "on the fly", so I was sure my settings would be very different than those selected for the flash-lit handshake shots.
This shot of the Valedictorian was made using only the house spot lights using a 28-70 equivalent lens on my Fuji T-4. I was shooting in burst mode, trying to capture one expressive moment during her presentation. This is the one I selected (60 frames just to get this one), and it's a winner.
When the last speaker had spoken I hurried back to my shooting position on Stage Left, an waited for the presentation of the diplomas. Only one shot per graduate was needed, and the whole process went quickly.



