Capabilities used by Manipulators to easily determine valid actions on a GraphElement.
| Selectable | The GraphElement is selectable. |
| Collapsible | The GraphElement can be collapsed. |
| Resizable | The GraphElement is resizable. |
| Movable | The GraphElement is movable. |
| Deletable | The GraphElement can be deleted. |
| Droppable | The GraphElement can be dragged and dropped (using the Drag&Drop events). |
| Ascendable | The GraphElement will be brought to the front of its layer when it is selected. |