Defines nonlinear convergence criteria [CNVTOL], and lets you add a tolerance for nonlinear convergence specifications, edit existing specifications, and delete currently defined specifications.

Lists convergence specifications that you have defined. As new specifications are added, this listing area updates automatically. You can select any of the defined convergence specifications by clicking on that line within the box. The selected specification will be highlighted, and you can then pick either Edit or Delete to modify the convergence criteria set.