| Main Element Display Management Menu. |  |
| Display objects. |  |
| Display all elements. |  |
| Display only selected elements. |  |
| Display last element. |  |
| Erase element. |  |
| Erase all elements. |  |
| Erase last element. |  |
| Destroy display list. |  |
| Redraw element. |  |
| Destroy elements. |  |
| Recover destroyed elements. |  |
| Name an element. |  |