Playing with the tool some more, I can see that Andrzej is right.
There are a number of missing features in the polygon tool that exist
in the zone editor. Adding corners is a large one.
If you have an existing non-copper zone, it seems you can keep it,
change its layer, add cut-outs, etc. Even duplicate to create a new
one. But you can't draw a brand new one.
-S
2018-02-23 17:07 GMT-08:00 Andrzej Wolski <awolski.kicad@xxxxxxxxx
<mailto:awolski.kicad@xxxxxxxxx>>:
Was it ever possible to run the fill algorithm (meaning, only
fill in parts of a polygon outline, based on some clearance to
other items on the same layer) on a non-copper zone?
No, I didn't mean it was already possible.
Seth, yes I see that dialog too in old builds, but the outline
appearance doesn't do anything (because non-copper zones are
always shown filled, not with an outline)
Zones on paste layer shown in outline::
https://imgur.com/a/5g4cI
Andrzej