UV Commands
Top: UV points; bottom: UsePolygon mode.This command basically does the opposite of what the UV Terrace command does. Executing this command will result in the following, depending on the mode selected:
The Unstitch UV command lets you separate parts of the UV mesh in order to edit them separately.

Select rows of points whose individual points should be lined up in a row based on defined start and end points. The rows of points must be well-defined so the algorithm can identify them as rows. This command will not work on several rows of points lying on top of each other!
Left: Initial state; right: Boundary to Quad; right: Boundary to Circle.These commands can be used to convert the boundaries of selected points or polygon regions to a quad or circle (or to an ellipse, depending on the texture dimensions), respectively.
For point selections, only selected UV Island boundary points will be moved.