You can modify the layout of multiple UVs at once on polygonal or subdivision surface geometry using the UV Lattice Tool in the UV Editor.
The UV Lattice Tool gives you a high level of control over your UVs by letting you edit the layout of numerous UVs at a time with a 2D lattice deformer.
To edit the layout of your UVs using the lattice manipulator
The UV Editor appears.
Right-click in the view and select UV from the marking menu that appears.
The UV Lattice Tool Options window appears.
A UV lattice manipulator appears over and surrounding the target UVs.
Shift-click lattice edges or control points to include them or remove them from your selection.