You can exclude operations from the current surface build while preserving them in the surface definition list. Excluding data is useful for comparing scenarios. For example, you can add additional points to a surface from a point file, and later disable the Add Point File operation. The surface will revert back to the original (pre-point file) triangulation.
You are prompted with a warning to confirm the changes that you made to the surface definition.
The surface is rebuilt with the unchecked operations excluded.