Hi, For the DrGeo workspace for kid programming, I will need these features in the code presenter. I did not find how to do it, nor example I can transfer knowledge from: * line numbering, when mentoring kid it is useful to point to a particular line of code * fontsize, when video-projecting to a class, I need larger font size for the code Any tips, direction or know how is welcome. Keep safe Hilaire Here is another the situation, maybe it is bugs: When I set the code presenter behavior to nil, the highlight is correct, and there is no left column: Then when the behavior is set, below to Object (I previously set to UndefinedObject), the syntax highlight is not right and there is a left column(for numbering?): -- Dr. Geo http://drgeo.eu