I work on 2 screens, with a lot of lists to work with, some have 5-10 items, others 30-50.
Editing the lists is too slow (check the list as it is) items, jruler does wonder to keep my location
(also when I'm getting distracted by phone call).
A very very useful tool.
Peter ten Hoopen
Incredibly useful little utility. Have been using it for ten years or thereabouts.
Best ruller I have ever used