Splits a surface into multiple surfaces at the selected isoparms.
If Keep Original is on when you perform the detach, the original curve or surface is retained.
You can edit the area of detachment with the Show Manipulator Tool. Select the detached curve and the detachSurface node in the Channel Box, then select the Show Manipulator Tool. If you drag the black manipulators, the area of detachment grows and shrinks accordingly.