To delete a surface:
1. Select the Surf-Delete Surf command.
2. Position the cursor along one of the rows or columns of the surface and click the left mouse button.
3. Repeat step 2 as many times as you want. The Delete Surface command will stay active or current until you select another command.
Note 1: If you delete a surface by mistake, you can use the Edit-Undo command to undo the deletion command.