What command is used to create a rounded part by revolving a selected region in synchronous mode?

The command used to create a rounded part by revolving a selected region in synchronous mode is the Revolve command. This command allows users to take a 2D profile and rotate it around a specified axis to produce a 3D cylindrical shape. Revolving a profile is particularly useful for creating parts with rotational symmetry, such as bases for vases, knobs, or any other feature that is circular in nature.

By selecting the desired region of your sketch and specifying the axis of revolution, you can control the thickness and depth of the resulting 3D object. This method is efficient for creating complex shapes from simple sketches and is a foundational technique in solid modeling within Solid Edge.

The other options mentioned do not serve the same purpose. The Rotate command is typically used for altering the orientation of existing objects rather than creating new geometries. The Extrude command generates 3D shapes by extending a 2D profile linearly rather than revolving it. Lastly, the Twist command is utilized for applying a twisting motion along a feature or edge, but it does not create rounded parts from profiles. Thus, the Revolve command is indeed the appropriate choice for creating rounded objects through revolution in synchronous mode.