How to copy sub D edge or point to new position

[Tien_Pham]

i try to add concave point on my sofa, could you know some function to copy a circle edge to all new position please help me?

[inju]

_Align _ToCurve

[BrianJ (Brian James)]

For an alternate method for this type of effect see

3D modeling Tufting in Rhino