What does the "Mirror" feature do in Fusion 360?

The "Mirror" feature in Fusion 360 allows users to create a mirrored copy of selected objects across a specified plane, which is essential for maintaining symmetry in designs. This tool is particularly useful when working with parts or assemblies that require identical halves or symmetrical components, as it saves time by eliminating the need to model each side separately.

By selecting a plane of symmetry, the user can ensure that any updates or changes made to the original objects are automatically mirrored, maintaining consistency across the design. This capability is crucial in many engineering and design applications where symmetry is not just aesthetic but also functional, as it can impact the performance of the final product.

Other options may include creating copies or modifying geometry, but they do not specifically address the unique function of mirroring across a plane, which is critical for achieving true symmetry in CAD modeling.