I have lot of polygons with the same situation: In the example graph I unwittingly traced  2.75  instead 3 remain, how do I set this as  3 and others that remain joined at their vertices can varying their angles to get the extent required and achieve 5,3,5, something like moving body extremities, where you can change the shape slightly from the lines or move in different angles that share vertices, not the dimensions. how to do it ?