.The nerve can be adjusted by dragging around the red spheres. Every sphere can be dragged. When a point is dragged, arrow draggers indicate that the point is being moved.
To edit the nerve, use the left mouse button to drag the red spheres defining the line.
1. Right-click the nerve in the 3D viewer and select Edit Nerve from the shortcut menu. The Add Nerve action page is opened.
Note
If the Nerve wizard is already open, click the nerve you want to select.
2. Do one or more of the following:
— Click a sphere and drag it to adjust the position.
— Insert a point .
— Add an end point 
.
— Remove a selected point 
.
Note
Make sure the viewer is in Interaction mode in order to edit the nerve.
Add a point in between points or add an end point
Edit the shape of the Nerve Reslice