In the Tools->Symbol library menu, you can find a tool designed for editing the existing and creating new symbols used in symbol shapes (Fig. 19). There are three basic shapes: circle, square and triangle, whose visual features, namely the color of the fill and the border, can be changed, giving the names to the symbols created in this way. The default symbol is a yellow circle with a black border - this is the shape for undefined symbols on the map.
Fig. 19. Symbol editor.