Map Pedometer - How far did you go?

Thanks. May be I haven't find up to now all functions of this useful site. It would be good if you may load an old map and move, say, a corner, half way, not only the last point. At any rate, a runner usually isn't a lazy person, so surely we can manage, even with what we have at the present.

Is there a way to edit the points of a saved route?