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# Modifying Surfaces

The Surface menu includes properties common to all surfaces, and specific controls for bilinear and bicubic surfaces. You can change a surface's shape, position, and transparency, as well as apply lighting effects. You can also apply four-point tracking data to a bilinear surface.

To access the Surface menu:

1. Double-click the selected surface in the schematic, or follow the tab population rules for the Object menu. See Populating Menu Tabs of Selected Objects.

   The Object Image menu appears with the Image controls for the selected surface displayed on the right side of the menu. Some of the tabs for the Surface menu are contextual, and are available depending on the circumstance.

#### Topics in this section

- Surface Settings
- Vertices Settings for Bilinear Surfaces
- Vertices Settings for Bicubic and Extended Bicubic Surfaces
- Blending Settings
- Lens Distort Settings
- Sources Settings
- Changing the Shape of a Surface
- Surface Blending Modes
- Offsetting a Surface
- Reshaping Using the Channel Editor