if you use the polyline command instead of the sketch command means that you also soften the lines.
returning to the relief speech, I imagine you have to do a job as a dummies. I have seen how you work, every little detail is important and everything needs to be cataloged. I wonder, why not use photogrammetry to bring the relief back to the plant? At least the reliefs that have large extensions. .....the work of Carthusian who you have just described above all when there is to detect even the smallest details of a finding, when it concerns small areas of soil.
in the sense that what you need to focus on small areas is rightly required all the attention you have described. For example, I find an ancient vase, reversed and with what was the content scattered around the vase. at that point the area to be detected is small and must act millimeterly. when the area is more extensive, like mapping the entire site, then the photogrammetry is of great help. always in concert with the reliefs made with electronic instrumentation, bensi.