Comment 2 for bug 170883

Could you please eloborate on defining "exterior" of a shape? :)

Does it mean clicking outside of a shape, or clicking
exactly the stroke of a shape?

Does a shape should be selected before filling its
"interior" or stroke?

If no, how would you colorize a stroke with 0 width and
transparent fill? ;)

Another little thing. Say, you have two layers. The first
layer contains a rectangle that is as large as the page
itself, so that you don't see the background at all. The
second layer contains some object and is currently active.
How would you apply a color to background in this case??