Bend Angle command
Use the Bend Angle command 
 to modify the bend angle of a sheet metal part. When editing the bend angle, you               first select the bend (1) you want to edit, then select a planar face (2) that you               want to remain fixed. This establishes which faces remain stationary and which faces               move.

When working with sheet metal models imported from another application, you should first use the Convert to Sheet Metal command to convert the model to a sheet metal part.
© 2021 UDS