Intersection

Selection prerequisites: Two intersecting objects, each of which is a straight object, circle, or arc.

Constructs a point at each intersection of the two selected objects. If the objects actually intersect in two places, two points are constructed; otherwise one point is constructed.

The keyboard shortcut for Intersection is Ctrl+I (Windows) or z+I (Mac).

Both intersections constructed

One intersection constructed

If you later drag the intersecting objects apart, the constructed intersection point disappears, and reappears when you drag the objects so that they’re again touching.

You can also construct a point of intersection by clicking with the Selection Arrow tool or with any tool that constructs points as part of its operation (such as the Point, Compass, or Straightedge tools).