Choose Home tab→Section group→Live Section .
Select an existing planar face, reference plane, or principal plane on a coordinate system.
The live section is created.
Tip:
You can use the Live Section Colors section on the Colors page of the Solid Edge Options dialog box to specify the colors you want to use for the edges, centerlines, and regions for live sections.
You can use PathFinder to display and hide live sections.
The live section automatically updates when you add or remove features, or modify the 3D model.
Move the live section plane and the section updates as the plane intersects the model.