---
title: Eraser
slug: task-view-guide/eraser
docTags: 
createdAt: 2025-09-18T13:12:58.956Z
---

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## The 3D eraser

The eraser works similarly to the brush tool, but instead of coloring, it unclassifies points within the brush area. The eraser tool will not erase a locked class. 

You can activate the eraser by clicking the erase button in the left side toolbar or using the shortcut `n`.

::Image[]{src="https://api.archbee.com/api/optimize/wLEz_RbWP6nIMpY-prjlm/nj_O787Y6WQ4nXOMXAZSD_eraser-tool-3d.gif" size="50" width="1000" height="500" position="center" caption="Eraser tool" darkWidth="1000" darkHeight="500" showCaption="true"}

### Quick-erase

Sometimes you might be in the middle of classifying points and don't want to deactivate the selected class. In this case, we recommend activating the quick-eraser. 

Press `alt` while the drawing tool is active, this will activate the eraser temporarily. In other words, once you let go of the shortcut you will return to the drawing mode again.
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## The 2D eraser

With this tool, you can remove parts of [2D polygon](docId\:AHY5X1PfGtBuAEJeGoPnC) or [2D curve](docId\:GeLUD2vAZD-HNmDdJvuod). 

You can activate the eraser manually in the left toolbar, or use the default shortcut key `n` to activate it. 

### Erase process

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Activate the eraser tool, 
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Place points surrounding the area you want to delete,
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Close the polygon, 
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The area should now be unlabeled. 

The eraser tool will not erase a locked polygon (class or object). 
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::Image[]{src="https://api.archbee.com/api/optimize/wLEz_RbWP6nIMpY-prjlm/y6wSAlXbH0wzGSc7X8Up3_eraser-2d-tool.gif" size="50" width="2000" height="1002" position="center" caption="Eraser tool" darkWidth="2000" darkHeight="1002" showCaption="true"}

::Image[]{src="https://api.archbee.com/api/optimize/wLEz_RbWP6nIMpY-prjlm/Jvek0Eiz5mCCrwICWYifl_erase-curves.gif" size="80" width="766" height="355" position="center" caption="Using the eraser on a 2d line" darkWidth="766" darkHeight="355" showCaption="true"}

When erasing 2D lines and 2D curves a new object will be created for each line segment that lies outside of the erase polygon. If the line or curve is a part of a [Geometry collection](docId\:tTqlpetOp63Czrwp3vn48) the new objects will be added to the same geometry collection.
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