### **NondesignDomain2D** * * * * * **Description**： Design a non-desgin domain in 2D problem. (This component must be used after generating the mesh.) **Usage**： Right-click on **ShowSelElement** to display cells that are not designed, and use cell center points to represent cells. **Input**： D: Reference line of non-desgin domain. You can input lines or surfaces. Tol: The tolerance for area determination. This parameter will be invalid when you input surfaces. **Output**： NonD: Non-desgin domain.