Some documentation available now

 From:  Frenchy Pilou (PILOU)
About the Helpers lines seems you must add a little line before the use of the little marker :)
for say that you can use the Numeric Calculator for Distance and Angle box
This distance will block the helpers lines next point along it, and angles will makes steps rotations around the first point clicked+drag with angle input it.
Some powerlful indeed!

Is beautiful that please without concept!
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EDITED: 1 Oct 2007 by PILOU