Because of the rectangular definition of surfaces, you have three options in the surface reverse process.
- You can keep the same surface, but reverse the direction of the calculated normals, thereby turning the surface inside out. This is perhaps the most common function as it affects isoline milling.
- You can reverse the layout of the surface by swapping all the row and column layout with each other.
- You can also reverse the trim loops of the surface. This process takes a trimmed surface and changes the trim operation so that what was trimmed away before is now the retained surface and the discarded surface is the surface you selected for the surface reverse operation.