Hi, I'm looking for the tool where you can reshape a polygon based on another polygon or feature. But instead of tracing the new border, you simply draw a line that crosses the border of the existing polygon and incorporates any border found within the line. It's hard to explain, but I will include a photo. I've also included a photo of what actually happens.
In addition to the suggestion provided by Dan Patterson and since you did not mention if you are using ArcGIS Pro or ArcMap below two related links for ArcMap: