# Node and Polygon Operations

Node operations allow you to add, move, and delete the nodes of editable elements.

## Move nodes

Allows you to move one or more nodes of the selected editable elements. Note that this tool also allows you to select elements. To move a node :

1. Enable the tool by clicking on ![](https://content.gitbook.com/content/DUF1p2rT0hfE3QBlbbvE/blobs/AdpwphJLztZ7faIsqJFE/move_handle.png).
2. Position the cursor close to the node and it will be highlighted.
3. Drag and drop the node to the desired position.\
   ![](https://content.gitbook.com/content/DUF1p2rT0hfE3QBlbbvE/blobs/RH5Nr8q1ynWPAxOXk15D/noeud1.png)

To move several nodes simultaneously while maintaining the topology:

1. Enable the tool by clicking on ![](https://content.gitbook.com/content/DUF1p2rT0hfE3QBlbbvE/blobs/AdpwphJLztZ7faIsqJFE/move_handle.png).
2. Select the desired element(s).

   ![img](https://content.gitbook.com/content/DUF1p2rT0hfE3QBlbbvE/blobs/qEnzdp1HgUoSRwET5KBm/noeud3.png)
3. Press and hold the **SHIFT** key and select the nodes that must be moved by clicking or drawing a box. The selected nodes will be highlighted.

   ![img](https://content.gitbook.com/content/DUF1p2rT0hfE3QBlbbvE/blobs/Jc39waIpgNlUXOHyKTy6/noeud4.png)
4. Drag and drop the selected nodes to the desired position. All selected nodes are moved simultaneously.

   ![img](https://content.gitbook.com/content/DUF1p2rT0hfE3QBlbbvE/blobs/3izVDNehmPFC393f4Vgr/noeud5.png)

## Add node

Allows you to add a new node to a selected editable element. Note that this tool also allows you to select elements.

1. Click on ![](https://content.gitbook.com/content/DUF1p2rT0hfE3QBlbbvE/blobs/HQU0gbiE1E5tSxbjLd4E/add_handle.png) to enable the tool.
2. Position the mouse pointer on one side of the element and a yellow dot will appear to show the position of the new node.
3. Click to confirm.

## Delete node

Allows you to delete an existing node from the selected editable object. Note that this tool also allows you to select elements.

1. Click on ![](https://content.gitbook.com/content/DUF1p2rT0hfE3QBlbbvE/blobs/XjftgAYJ5Jk0FCs06dl0/delete_handle.png) to enable the tool.
2. Bring the pointer near the node to be deleted and it will be highlighted.
3. Click to confirm.

## Rotate lines and polygons

Allows you to rotate polygon and line elements around their center.

1. Click on ![](https://content.gitbook.com/content/DUF1p2rT0hfE3QBlbbvE/blobs/I0ySsKQDBUg6CakPfmgw/poly_pivoter_bouton.png) to enable the tool.
2. Select one of the element's points.
3. Rotate it.
4. Release the point when you reach the desired position.

<figure><img src="https://content.gitbook.com/content/DUF1p2rT0hfE3QBlbbvE/blobs/TFJDMylHtgC3zYAcvMWV/poly_pivoter.png" alt=""><figcaption></figcaption></figure>