Add functionality of Intersection Tool that exist in ArcGIS Desktop 10.x to ArcGIS Pro. While editing you can click on one line and then a second line and a vertex is placed at the intersection of these two lines. I use this tool in ArcGIS Desktop 10.x to find the intersection of lines in a polygon that I need split. Using the Split Polygon tool I use the Intersection editing tool by clicking on two lines within a polygon that would intersect, this creates a vertex at that intersection point and then I draw out from this vertex in different directions to the intersecting lines and split the polygon. Imagine having a footprint of a house with attached garage as one polygon and you want to split out the garage and house from the footprint and create two polygons of the garage and house.