Edit surfaces using data edit operations, which are added to a surface definition as edit operations and not to any of the existing surface data components.
You can access the data editing functionality for a surface by right-clicking 
Edits under a surface Definition in the Prospector tree. If a surface type does not support an edit operation, the operation is not listed. The following table lists the edits that are supported for each surface type: 
| 
 Edit Operation  | 
 TIN Surface  | 
 TIN Volume Surface  | 
 Grid Surface  | 
 Grid Volume Surface  | 
|---|---|---|---|---|
| Add points | 
 Yes  | 
 Editing operations are not supported  | 
 Yes  | 
 Editing operations are not supported  | 
| Delete points | 
 Yes  | 
 Yes  | 
||
| Modify points | 
 Yes  | 
 Yes  | 
||
| 
 Move point  | 
 Yes  | 
 No  | 
||
| 
 Add line  | 
 Yes  | 
 No  | 
||
| 
 Delete line  | 
 Yes  | 
 Yes  | 
||
| 
 Swap edge  | 
 Yes  | 
 No  | 
||
| 
 Minimize flat areas  | 
 Yes  | 
 No  | 
||
| 
 Smooth surface  | 
 Yes  | 
 No  | 
||
| 
 Paste surface  | 
 Yes  | 
 No  | 
||
| 
 Raise/Lower surface  | 
 Yes  | 
 Yes  | 
||
| Simplify surface | Yes | No |