Hiding and showing return arcs
Return arcs show how control is returned to a calling program. The return arcs have a dash double dot pattern (—— - - —— - -).
At the highest level, the calling arc and return arc join the same two nodes. However, once layers are expanded, a return arc often connects to a different node to the node that originated the calling arc.
When return arcs are hidden, the control flow graph has fewer lines on it, and so may be easier to follow.
Hiding return arcs
- On the Control Flow Graph window Window menu, click Show Return Arcs so that is it unchecked. Alternatively, click the Show Return Arcs icon. The control flow graph is redrawn, hiding the return arcs. Any marked nodes remain marked, and the currently selected node stays selected.
Showing return arcs
- On the Control Flow Graph window Window menu, click Show Return Arcs so that is it checked. Alternatively, click the Show Return Arcs icon. The control flow graph is redrawn, showing the return arcs. Any marked nodes remain marked, and the currently selected node stays selected.
See also Working with the control flow graph