Hi there,
You can draw free format elements by right clicking on the workspace, and choosing 'Add line/surface' (or the equivalent French 'Ajouter ligne/surface').
This will give you a line with two points.
Right click one of the points, and select 'Add point' (Ajouter un point).
Add as many points as you wish.
To make a surface, right click one of the points again, and select 'Close line' (Fermer la figure).
This should give you a surface. You can drag the points around, add more points, select a color, etc.etc.
I'm sorry about the fact that we do not provide a manual in French, but you might be interested to download the
English manual.
It explains all of this in chapter 13.
We are working on a number of tutorials in French. You can expect them to appear on our website in due time.
David.