You can control just how round they look. Curved connectors can follow any smooth curved path you care to define. Curved connectors are defined by placing intuitive control points along the path rather than the more confusing bezier points that other programs use. Smoothed connectors are a lot like curved connectors except they pass right through each control point for the simplest possible control. Flow symbols allow you to create connectors whose path is defined by a repeating pattern of symbols rather than a simple line.
Flow symbols are a good way to illustrate special relationships and sequences of events.
You can control the shapes, the colors, the size and the spacing of the symbols. Many built-in symbol shapes are included. With more patterns, you can use different connector styles to represent different relationships and easily distinguish between them. There is no restriction to the thickness of patterned connectors. Line patterns and line widths can be combined however you like.