Video: https://youtu.be/SyQWeRodomk

Instructions from Video:

The Match Planes tool can instantly change the plane of one roof surface to match the plane of another. This is a great tool when you have uneven plate lines but you want them to share the same roof plane to avoid a valley.

To match roof planes:

HINT: To select the roof planes it is easier to do in a 3D view or a 2D Designers view. In the 2D Plan view, the surfaces are represented by a single line that may be difficult to select but in a 3D or 2D designers view you can select the roof surface by picking in the middle of the roof.

  1. Click on the roof to select it, then right-click and select Match Planes. Or, select Edit > Modify Elements > Match Planes.
  2. Click on the roof surface whose plane you want to apply to another surface. In 3D click anywhere on the surface to select it.
  3. Click on the roof surface whose plane you want to match with the plane of the first surface selected. The plane adjusts.
  4. Right-click and select Finish.