To Shape a Surface using Reparameterization Curves
1. Open the Surface tab for the surface you want to parameterize.
2. Click 
Reparameterization. Reparameterization mode is activated.
Reparameterization. Reparameterization mode is activated.3. Move the pointer over the surface, a boundary curve, or an internal curve, to the approximate location where you want to add a reparameterization curve.
4. Right-click and choose Add U reparam curve or Add V reparam curve from the shortcut menu. A reparameterization curve is created.
5. Drag a reparameterization curve or one of its soft points along the boundary curve until the surface is parameterized as desired.
6. To create and position more reparameterization curves, repeat steps 3–5.
7. Click Reparameterization to exit Reparameterization mode.
Reparameterization to exit Reparameterization mode.8. Click 
OK.
OK.