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Predefined modifiers are pairs of geometry. The first one indicates where the target geometry was, and the second indicates where the target geometry is supposed to go.

1. Click the Transformer Rig icon to open the toolbox.
2. Select the target geometry.
3. Click Accept.

   Now click Add Predefined Modifiers to start adding before-and-after pairs of modifiers.

4. First click on the geometry that is in the “Before” or “From”position, location, or shape.
5. Click Accept to continue.
6. Select the corresponding geometry that is in the “After” or “To” position, location, or shape.
7. Click Accept to finish.
8. To add more pairs of modifiers, click Add Pre-Defined Modifiers again and follow steps 4 through 7.