Make a circle on the ground plane to use as a pathfor follow me, and a vertical circle to use as a profilefor the button:
[image: ROfO_Capture.JPG]
Draw a horizontal line just under the center of profilecircle, and erase the bottom arc. Scale the profileshape along the blue axis to get the cross section of a button.
[image: OtFN_Capture2.JPG]
Select the path, then click on the profilewith the follow me tool, like so:
[image: 8cJF_Capture3.JPG]
If you need a plugin for making the cushion, that's probably the Subdivide and Smooth (or Artisan) plugin...search the "Tutorials" forum for "sofa"...