Choose Diagram tab→Modify group→Insert Bend.
Select a point on a linear segment to specify the start point for the bend.
Edit the radius or sweep angle or click in the direction you want to bend the segment.
Note:
If the selection is the main run, you have four choices for the bend direction, but you only have two choices if your selection is not the main run.
Click to place the bend.
Note:
You can use the Flip option on the Insert Bend command bar to flip the direction of the bend.