---
title: 3D lines
slug: task-view-guide/3d-lines
docTags: 
createdAt: 2023-09-25T11:00:02.548Z
---

![](https://api.archbee.com/api/optimize/wLEz_RbWP6nIMpY-prjlm/T2K4ds4aVde2laG773dj2_skarmavbild-2023-09-25-kl-153842.png "3D line shape")

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## Drawing tool

This geometry shape is drawn using **the** **3D line tool**. It is mainly used for outlining areas. 

### Drawing process

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Select a class
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Move along the line or edge and place points where you want to have control points.

The points will be placed at the lowest point in the point cloud at that location.
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Continue placing points until you feel done with the object.
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## Create from a prelabel

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Select a class
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`Shift+click` on a prelabel to apply the selected class
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## Transformation controls

### Adjust

Use the 3D [Transformation controls](docId\:AI1c20I3hoU_BEXm8fFMX) to adjust the placement of the line point. To change the entire line, press `shift` before moving the controls. 

### Extend the line

You can extend a line from the start or end with keyboard shortcuts. Press `0` to extend the line from the end or `shift+0` to extend the line from the beginning. 
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## Zoom to selected

**Zoom to selected** to quickly review the points along a line by pressing `k`.
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## Select point in 2D miniature image

You can select projected 3D line points in the 2D miniature image.

::Image[]{src="https://app.archbee.com/api/optimize/wLEz_RbWP6nIMpY-prjlm/V0o6jvdYaiX6qvqJoMY9F-20251202-105657.gif" size="50" width="599" height="813" position="center" caption="Select projected 3D line point in 2D miniature image" darkWidth="599" darkHeight="813" showCaption="true"}

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[Projections](docId\:HnGmpFPjhTMaCdfUwwe8M) 
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[2D miniature image](docId\:BUDTV3lL0y3HHQYK8qXGl) 
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## Step between points

Step between points using `alt+n`and `alt+p`.

::Image[]{src="https://api.archbee.com/api/optimize/wLEz_RbWP6nIMpY-prjlm/mb5wy4VnyI7vktmjFZMDS_zoom-to-point.gif" size="50" width="894" height="406" position="center" caption="Step between line points with shortcut keys" darkWidth="894" darkHeight="406" showCaption="true"}
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## Reverse direction

You can reverse the line direction by clicking on the 3D lane with the right mouse button and selecting "Reverse direction." See [Direction indicator](docId\:vg0RqVtpdKretT4oSVWCH) for how to view lane direction indicators.

You can add a custom shortcut to reverse the direction of the selected 3D line. See [The keybindings window](docId\:ZeOhmSOo_kfy-qZQnMNY2) for how to add a custom keybinding.

::Image[]{src="https://api.archbee.com/api/optimize/36CD7zAaOHvlVITPdmtCr-3w3H4TIslb6mMB4un2qJR-20240822-093013.gif" size="60" width="590" height="693" position="center" caption="Select "Reverse direction" in the context menu to reverse the direction of the shape" darkWidth="590" darkHeight="693" showCaption="true"}
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## Automatically close lines

3D Lines can be configured to automatically be closed. This way the last node will always connect to the first and is visualized while drawing.

::Image[]{src="https://api.archbee.com/api/optimize/wLEz_RbWP6nIMpY-prjlm/04OGsDwmSUJMiEJkzmgtY_image.png" size="50" width="632" height="812" position="center" caption="Closed line" darkWidth="632" darkHeight="812" showCaption="true"}
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***

## Related content

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The [Derived classes](docId\:t7pVIh7-6-Q3NbuECCDgF) feature is a way to automatically generate 3D lines based on other lines, such as lane connections and centerlines.
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[Node and shape edit modes](docId:9Y0ax8qabL5CeiKmQxRDe) shares insights on how to transform one node or the entire shape at a time.
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Find out how you can[Multi-edit nodes](docId\:UmF1ixrqo2cPGeL0yQTTL) on 3D Lines and Lanes, allowing you to adjust or remove the nodes. 
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