| Name | Description | Type | Package | Framework |
| AddNodesEditHandler | Horizon edit handler to insert nodes to the real line of horizon (above the flat horizon). | Class | lnb.comp.horizon.handler | LNB |
| DrawShapeHandler | Horizon edit handler used for visual shape drawing. | Class | lnb.comp.horizon.handler | LNB |
| HorizonEditHandler | Edit handler for horizon objects. | Class | lnb.comp.horizon.handler | LNB |