Use the Align Eaves tool to realign eave heights of different boundary lines of a roof.
 Tools panel
Tools panel
 (Align Eaves).
 (Align Eaves). 
  Dimensions display near the eaves to indicate their height.
As you select the remaining eaves, you can choose between adjusting the height or the overhang if you created the roof lines using Pick Walls. If you used the sketch tools to draw the lines, only Adjust Height is available.
 (Finish Edit Mode).
 (Finish Edit Mode). 
The results of adjusting the overhang are visible after you finish the roof.
