Modifying Plates and Shapes

Define cutback: select a shape then a plane.
Split plates and shapes: select one or more plates and/or shapes, then a wireframe element.
Merge plates and shapes: select two plates or two shapes.
Modify shapes: right-click the shape in the specification tree and select Definition, Extend or Stretch, then make appropriate changes.

Defining Cutback
Splitting Plates and Shapes
Merging Plates and Shapes
Modifying Shapes
Modifying Designs
Modifying Plates