Oswald in the doorway: the blog of the Oswald Innocence Campaign, by Ralph Cinque

This is Elsie Dorman's location:

It was the 4th floor, the 5th window over from the left. 

So, that gives us an idea of the angle from which she was shooting.

So, it was elevated but not too awfully elevated. And she was shooting from behind the Glovers but more so from their left side.

Look at the shape of that. One would assume that it's uncropped because no one would crop it that way.