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Align boundary of one polygon to another

Question asked by DGrill on Aug 23, 2017
Latest reply on Aug 15, 2018 by maria_nova

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.