Often times when I'm working in close to some lines as my cursor gets close the line segments
start getting jumpy, almost like a magnetic field is making the lines try to move away from the
cursor. I've shown two pics below. One are diagonal lines before I approach with the cursor
and the other shows how some segments of the diagonal lines move away ( jumpy ) from the
cursor as it gets closer. Sometimes there is quite a bit of jumpiness when I'm in close editing
and it's rather distracting. Any ideas what causes this ?