Divide paths using intersecting levels, reference planes, and other divided paths.
To select intersecting references to divided paths
Divisions and Intersects panel
Intersects drop-down 
Intersects
Finish to apply your selection or
Cancel to dismiss.
Divisions and Intersects panel >> Intersects drop-down 
Intersects List For surfaces, click Modify | Form tab
UV Grids and Intersects panel
Intersects drop-down 
Intersects List