This add-on restores the pre-4.1 auto smooth interface and behavior to Blender. It adds the familiar Normals panel back to the Object Data tab, where users can toggle auto smooth and adjust the smoothing angle directly.

Behind the scenes, the tool automatically manages the new auto smooth modifier, ensuring it consistently remains at the bottom of the modifier stack. Users can also access a Shade Smooth by Angle operator directly from the viewport right-click context menu for quick shading adjustments.