By default, when you select a surface mesh Maya displays all of the UVs for that mesh in the UV Texture Editor.
You can switch the UV Texture Editor between displaying all of the UVs for the current set and only showing a selected subset in isolation. This makes it easier to work on part of the model without disturbing or accidentally selecting other UVs.
To isolate a specific subset of UVs
To switch back to showing all UVs, click Toggle isolation again, or turn off the View > Isolate Select > View Set menu item.
To add to the isolated subset of UVs
To remove UVs from the isolated subset
Alternatively, choose View > Isolate Select > Remove Selected.
To display only the UVs that have the current image assigned
When you are in component selection mode, the Textures menu lists shading groups assigned to the selected components. In object selection mode, the menu lists all shading groups assigned to the entire mesh.
To display only the faces inside the selected UVs or edges
To display only the faces that share the selected UVs or edges
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