---
title: "Edit Polyline"
slug: "cyclone-3dr-editpolylinec"
updated: 2026-09-07T11:51:19Z
published: 2026-09-07T11:51:19Z
canonical: "rcdocs.leica-geosystems.com/cyclone-3dr-editpolylinec"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://rcdocs.leica-geosystems.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Edit Polyline

![CmdEditPolyline.svg](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/CmdEditPolyline.svg)

This command allows to modify a polyline manually.

> [!TIP]
> ### Requirements
> 
> Select one polyline and launch the command. You also can double click on a polyline or launch this command through the treeview if the current polyline representation mode is not inspection (otherwise, it will launch [Edit Colors](/v1/docs/cyclone-3dr-editgradientc)).

| ![editpolyline1.png](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/editpolyline1.png) | Red balls will be displayed on vertices. Small blue balls will be displayed on segments. > [!WARNING] > These balls are displayed according to the current zoom factor. |
| --- | --- |
| ![editpolyline4.png](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/editpolyline4.png) | Select vertices: - Click red balls individually (with CTRL key to add to the current selection). - Make a rectangular selection with SHIFT key. You can: - Drag and drop them. - Press DEL to remove them. > [!WARNING] > - Vertices can be selected even if they are not displayed (due to the current zoom factor). > - Press V to switch on/off snapping when making a drag and drop. |
| ![editpolyline2.png](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/editpolyline2.png)![editpolyline3.png](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/editpolyline3.png) | 1. Keep the mouse on a ball to display options, then choose one: 1. ![NewPoint.png](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/NewPoint.png) : add new segments: 1. DEL: undo the last created segment, 2. ESC: cancel the new segments and exit the option, 3. ENTER: validate the new segments and exit the option. 2. ![NewPointPerpendicular.png](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/NewPointPerpendicular.png) : add new perpendicular segments. Select the current mode with SPACE: 1. **Free** mode: give a point to define each segment length. 1. DEL: undo the last created segment, 2. ESC: cancel the new segments and exit the option, 3. ENTER: validate the new segments and exit the option. 2. **Junction** mode: add a new perpendicular segment, extend it to another polyline, then merge both polylines. Hover the polyline to join, to visualize possible combinations in magenta. 3. **Intersection** mode: add a new perpendicular segment and extend it to another clicked polyline. Both polylines will not be merged. 3. ![ExtendShorten.png](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/ExtendShorten.png) : extend or shorten the segment. Select the current mode with SPACE: 1. **Free** mode: give a point to define the new segment length. 2. **Junction** mode: extend the segment to another polyline, then merge both polylines. Hover the polyline to join, to visualize possible combinations in magenta. 3. **Intersection** mode: extend the segment to another polyline. Both polylines will not be merged. Hover the other polyline to visualize the result in magenta. 4. ![GripAddArcVertex.png](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/GripAddArcVertex.png) : add or insert a discretized arc. 1. blue ball to insert a discretized arc: give an intermediary point and define the maximal deviation allowed. 2. red ball to extend with a discretized arc: 1. **3 points arc**: give an intermediary point and the extremity, then define the maximal deviation allowed. 2. **tangent arc**: give the extremity and define the maximal deviation allowed. The created arc will be tangent to the previous segment. 3. ⚠️ **Maximal deviation allowed** ⚠️ - the value will be highlighted in orange if more than 100 vertices will be inserted. - the value will be highlighted in red - if negative - if higher than the current deviation: in such case, only one vertex will be added on the given point (like "Insert a new vertex" mode). 5. ![NewVertex.png](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/NewVertex.png) : insert a new vertex. 2. Repeat with another option. |
|  | Press ESC to invalidate the whole edition session or ENTER to validate and exit the edition command. |

> [!WARNING]
> ### Notes
> 
> New vertices will be added in the current polyline best plane, unless all current vertices are aligned (screen direction will be used instead).