In this scene, R2 is hanging upside down from a magnetic platform. The gizmo sticking out is a welding torch. He's working on the speeder in Thall's garage.
In order to speed up production, the layout artists were divided into two categories: Senior Layout Artist and Assistant Layout Artist. The Senior artist was the one with more experience or drawing ability as far as roughing out the scenes. The Assistant was the artist better at the clean up of the drawings.
Each Senior artist had an Assistant. The Senior artist would draw the layouts at 6 field size in rough and then give them to the Assistant, who would enlarge the drawings and clean them up at their full size.