In the UV Texture Editor ( Window > UV Texture Editor), there are separate menus for polygons and subdivision surfaces. Use the menu items under the Subdivs menu when you edit UVs on subdivision surfaces.

The items in the UV Texture Editor’s Subdivs menu work the same as the corresponding items in the editor’s Polygons menu.

You can use all other menu items, except the following:

• View > View Contained Faces and View > View Connected Faces

  To...	Do this
  Show UV borders more clearly in the texture editor.	Select Display > Subdiv Surfaces UV Borders (Texture Editor).
  Separate a UV shell into smaller shells.	In the UV Texture Editor, select edges along the new border you want to create and choose Subdivs > Cut UV Edges.
  Attach separate UV shell manually.	In the UV Texture Editor, select the common edges of separate UV shells and choose Subdivs > Move and Sew UV Edges > . Turn off Limit Piece Size and click Apply.
  Attach separate UV shells automatically.	In the UV Texture Editor, select all edges of all UV shells and choose Subdivs > Move and Sew UV Edges > . Turn on Limit Piece Size and set Number of Faces to the minimum number of faces a UV shell can have. For example, if you set 2, only shells with a number of faces equal to or less than 2 will be moved and sewn. Click Apply.
  Create an image of the UV layout on which to paint a texture.	In the UV Texture Editor, select Subdivs > UV Snapshot. The options are the same as for Polygons > UV Snapshot.

  TipAfter performing a Move and Sew UV Edges operation, you can select the history node (subdMapSewMove) in the Channel Box and adjust the Number of Faces until you achieve the results you want.