Edit NURBS > Selection

Grow CV Selection

Expands your CV selection in all directions around the surface.

Shrink CV Selection

Subtracts from your CV selection in all directions around the surface.

Select CV Selection Boundary

Keeps the outer CVs you have selected and deselect the inner CVs.

Select Surface Border

Selects CVs along the surface borders. The borders are defined by U and V values. By default, this operation selects CVs along all borders. In the options window for this operation, you can choose which border CVs you want to select: First U, Last U, First V, or Last V.