When Apollo 8 orbited the moon in December of 1968, it was the first time human eyes gazed down upon the surface of this alien world from so close. Apollo 8 showcased the very latest technology by the United States, and the mission, flown by highly-trained pilots, had clear and specific directives for lunar observation. Look at the walls.
Benches are flat areas below the rim but above the floor.
Note the rim relation, channels and possible eruptive features. Pay special attention to colors and any fracture patterns. Look for High Relief Structures. Inspect ridges closely. In these same areas you might find eruptive features and fine crater fields with a careful look.