The measuring point on the lower abdomen of this figure must have been put in during or before roughing-out and served as a reference point during carving. Why it was left is not clear though perhaps this relief was rushed into place.
A channelling tool is used to achieve depth in the drapery to the right following initial work with the drill.
The righthand knee of the emperor in this detail is very quickly carved, the crease running across the top of it simply modelled with a round-headed chisel. This is very fast carving and is typical of many of the Sebasteion panels.