Actually it's very easy. Drop a pushpin by touching your screen where you want the starting point to be, then scroll the screen by dragging it so that the place you want to measure to is under the pushpin, and you'll see the distance listed above in the text area.
Thanks, I like this suggestion better than your first, BUT if I drop a pushpin at location A then move the screen so that location B is under the pin then the display only shows the distance from me to location B.
Did I misunderstand?