Hello,

it would be okay for a point to be allowed to select a symbol.

If the symbol is a rectangle, for each point four lines wold be drawn to the dxf-file. Please take a look to JAG3D's source code for drawing point symbols.

it might make sense to have a sketch legend

The sketch is drawn to get an impression of the network, to evaluate weak-forms and so on. It is an analysis tool. Since you define the colours, the symbols etc. I believe, it doesn't make sense to provide a legend of your individual settings.

/Micha