Template:Maya2017 Align Surface
From TOI-Pedia
Align Surfaces
Surfaces > align: With this option the surfaces are aligned. Just as the curves there are three methods of alignment. The C0 –positional alignment, the C1 – tangency alignment ( the surface will make a smooth connection with the least impact on its original shape) C2 – Curvature. The curvatures will be matched to generate a smooth transition. The in and out curvature will be the same, the effect on the existing surface will be larger. In the option box the settings of the alignment can be altered.