Hi, 
i´m old research and advanced developer of CAD and navigation systems.
Potlatch is really great :o), Thanx!
Recently it is difficult to draw exactly outlines of buildings (sattelite 
pictures Yahoo) in Potlatch.
The reason: Drawing lines are too fat ( 1 pixel width in hairline modi for the 
edge is enough)
2. There is no option "freeze drawing direction".
How should it work?
- Paint first edge
- say "freeze" (shortcut shift+F)
After "freeze" you can draw in carthesian space wit only 90°, 180°, 270° 
direction.
Need more suggestions or young sw developer?
Cheers,
Marek Strassenburg-Kleciak
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