The direction lines and direction points at either end of a curved segment control the shape and size of that segment. You change a curved segment by dragging one of the direction points.
Step 1
Select the Arrow tool, then click a segment.
Step 2
Position the pointer on one of the direction points that appear and drag it around its anchor point using an arc motion.
Step 3
Drag the direction point away from the anchor point.
Step 4
When you’re finished, select the Arrow tool, then click away from the path to deselect it.