A toggle to turn on/off the Rotation Gizmo.
Averages the loop normals of each separate selected vertex resulting in a smooth vertex normal.
Averages every selected loop normal into single direction vector.
Smooth the selected loop normals based on the connected vertices normals.
These two buttons change the object setting from Smooth Shading to Flat Shading or vice versa. The benefit of doing this inside of Abnormal instead of default Blender is that in Abnormal your existing normal edits will not be changed. In default Blender changing the shading type will most likely destroy any normal edits made. In general I advise to stick to Smooth Shading.