You can modify or stamp straight edges in a sheet metal part by adding cosmetic or structural features, like chamfers, rounds, and cuts . Stamped features can be used to denote multiple types of sheet metal geometry (for example, a radius in the corner of a cut) or to show edge treatments to give the sheet metal walls a nonconstant wall thickness. Stamped edges can be used for both cosmetic and structural requirements (wall strength). The stamped edge is intended to increase design efficiency where you need to create complex geometry that sheet metal specific features cannot.

You can use the Unstamp Edge tool to remove stamped features when preparing your design for manufacture. The tool calculates the flat pattern for these edges, and adjusts the width of the part after unstamping. The transformed volume can be modified as required.