Use the Unbend tool to unbend one or more curved surfaces such as bends or curved walls in a sheet metal body. You can manually select individual bent geometry, or you can automatically select all bent geometry to unbend. When you create an Unbend feature, you must define a fixed planar surface or edge. Best practice is to select the same surface for all Unbend features. You can save time and maintain consistency by setting, at the body level, a fixed geometry reference for all Unbend, Bend Back, and Flat Pattern operations.