Which command is used to create a planar surface from multiple curves in NX?

The command used to create a planar surface from multiple curves in NX is the "Boundary Surface." This specific function allows users to generate a continuous surface by defining the edges using the curves provided. The Boundary Surface command is particularly powerful as it can accommodate a variety of curves, thus enabling complex surface creation.

When using Boundary Surface, the selected curves can be open or closed, and the tool connects these edges to produce a smooth, planar surface. This is essential in design scenarios where a flat surface is needed but defined by several different guidelines.

Other options, while related to surface creation, do not specifically cater to forming a planar surface from multiple curves in the same way. For example, the Project Curve command typically is used to project a curve onto a surface, which does not create a surface itself. The Interpolate Curve command is focused on creating a single curve that passes through defined points and does not generate surfaces. The Surface from Curve Network command is meant to create a surface from a network of curves but is more complex and typically does not produce a simple planar surface when multiple curves are involved. Hence, the Boundary Surface is the most appropriate command for creating a planar surface from multiple curves.