As I've used CAD over the years, I keep coming up with ideas. I think there are some programs that have tried this first feature maybe, but I'm not sure if they did it successfully.

1. To track from a snap point to another snap point. Sometimes, when drawing I get so many snaps that it complicates my snapping instead of helping. The idea is to snap to one point, press a key to select it, and track from that point to another point or to track from another point.

2. To be able to track along a cylinder's quadrants or centerline. When I work with rounded surfaces, especially cykinders, it would help to have the ability to track along the body of the cylinder at its quadrants and centerline. Maybe even more divisions would be helful sometimes.