Dear Michael Gibson

Your last explanation works for me....

If you want to place the first point of a line relative to some other point, you basically use the same procedure as above, but do it with a construction line. This can be a little tricky because you have to enter the distance constraint before you release the mouse button which finishes the construction line. (Hmmm, looks like there is a little bug here where activating distance constraint when you are doing a construction line also activates it for the actual drawing command as well, I will fix that up).

Start with the left mouse click from one point while dragging/hold it while you put in the number, release the mouse, and left click the point you just made while dragging/hold, and then gain put in the number...voila!...it works for me!

Looks like you can do it in any situation.....

Thanks for your explanation!