Toggles the Intersection Snap setting on or off. When set to ON, you can snap a new entity that you are drawing to the intersection of a combination of entities. You can snap to the combination of an arc, circle, ellipse, line, Polyline. If the target covers only one entity, the program prompts you to select a second entity and then snaps to the point at which the two entities intersect. To use this choose 'Settings Menu > Snap > Intersection snap' or select icon from snap toolbar.
To use Intersection snap