# 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://2098443701-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcA9CuUnY5hTYroiPhD1w%2Fuploads%2FO3mCirqKdLJoeEwuaEbf%2Fmove_handle.png?alt=media\&token=f8671031-485a-4acf-901a-e2ecff8fa0a1).
2. Position the cursor close to the node and it will be highlighted.
3. Drag and drop the node to the desired position.\
   ![](https://2098443701-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcA9CuUnY5hTYroiPhD1w%2Fuploads%2FdGc1RpR1oJaWIZL28XuS%2Fnoeud1.png?alt=media\&token=78257407-e95c-4255-9090-2771a5f58328)

To move several nodes simultaneously while maintaining the topology:

1. Enable the tool by clicking on ![](https://2098443701-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcA9CuUnY5hTYroiPhD1w%2Fuploads%2FO3mCirqKdLJoeEwuaEbf%2Fmove_handle.png?alt=media\&token=f8671031-485a-4acf-901a-e2ecff8fa0a1).
2. Select the desired element(s).

   ![img](https://2098443701-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcA9CuUnY5hTYroiPhD1w%2Fuploads%2FV2vdtwfLTkdHHVZEZMMt%2Fnoeud3.png?alt=media\&token=a20adf3d-c0e1-4a9b-b5e2-cc0bf8ed2a5a)
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://2098443701-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcA9CuUnY5hTYroiPhD1w%2Fuploads%2F80QkU1kRhn3izA55LQOQ%2Fnoeud4.png?alt=media\&token=62cda41a-4c3e-4569-b553-72101a623df6)
4. Drag and drop the selected nodes to the desired position. All selected nodes are moved simultaneously.

   ![img](https://2098443701-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcA9CuUnY5hTYroiPhD1w%2Fuploads%2FMcYOgK2NkLA4i8YLHbR1%2Fnoeud5.png?alt=media\&token=4f927927-574c-4c6b-bb00-1410746c240f)

## 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://2098443701-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcA9CuUnY5hTYroiPhD1w%2Fuploads%2FSVvUxkByVfqWHPB6NKM5%2Fadd_handle.png?alt=media\&token=89f08a41-99b8-4761-b59c-248d9ce0ecc0) 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://2098443701-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcA9CuUnY5hTYroiPhD1w%2Fuploads%2FWRXJUyQFH0hdMz5bV8rU%2Fdelete_handle.png?alt=media\&token=82148bb7-5e5e-4642-88e0-18ab0029239c) 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://2098443701-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcA9CuUnY5hTYroiPhD1w%2Fuploads%2FMtbMSj8YD2mhd4xPDkyB%2Fpoly_pivoter_bouton.png?alt=media\&token=313b6064-2514-47cf-a6ab-9716ae5778f8) 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://2098443701-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcA9CuUnY5hTYroiPhD1w%2Fuploads%2FnDfvQUzTCARl9poclyfT%2Fpoly_pivoter.png?alt=media&#x26;token=549d54cb-f5ec-4a22-af10-4258829349b4" alt=""><figcaption></figcaption></figure>