Rip Vertices and Extend(頂点のリップと移動)

参照

Mode(モード):

Edit Mode(編集モード)

Menu(メニュー):

Vertex(頂点) ‣ Rip Vertices and Extend(頂点のリップと移動)

ショートカットキー:

Alt-D

This tool "rips" (duplicates) the outermost vertices of the selected edges, then creates new edges between these copies and their originals. The neighboring faces stay connected and are "extended" with the new vertices, turning them into n-gons.

Before ripping.

After ripping.

When run on border vertices, the result is similar to Extrude Edges(辺を押し出し), except that (again) the existing faces are merely extended with new vertices. No new faces are created.

Before ripping.

After ripping.