Adjusting boundary of the polygon from one layer to the boundary of a polygon from another layer.
Working in ArcGIS 10.2.1, I have a geographic boundary (polygon1) in one layer that I need to snap to another dissemination area boundary (polygon 2) in another layer. I tried using the snapping toolbar, but it retained polygon 1's shape, which I don't want. I want it to reshape it to polygon 2's boundary. I tried using align to shape. I used the trace button to trace the boundary I wanted around polygon 2 and the part of polygon 1 that I want to keep (see the attached pic). However, the align button that is supposed to be active does not activate. I even tried increasing the buffer to see if the button would activate but it didn't. Does anyone know why this didn't work or another way to do this. Thank you.