My next concern is really interesting; and involves a concept I should easily like to remember!  I see the Add Point tool, and would like to add a point halfway between the two existing points, and halfway down the line?  I could do it by hand, but would like to eliminate guess.  Similar to being interested in adding one new point, I should like to know how to add multiple points evenly.  Lets's say I'd like to 3 more points, so that there is a point at each 1/4 distance of the line?