Creo Flexible Modeling > Moving Geometry > Example: Flipping the Direction of the Splitting Surface
  
Example: Flipping the Direction of the Splitting Surface
Click the Flip command to change the direction of the splitting surface.
In this move, the surface on the bottom boss moved, and the Flip command changed the direction of the splitting surface. The surface of the top boss extended to maintain the original attachment to the bottom boss.
1. Selected boss
2. Extending surface
3. Splitting surface
4. Moved surface