---
title: 2D bounding boxes
slug: task-view-guide/2d-bounding-boxes
docTags: 
createdAt: 2023-08-09T08:34:20.846Z
---

![](https://api.archbee.com/api/optimize/wLEz_RbWP6nIMpY-prjlm/ogbiLPydBNTOOwPUwlAhn_skarmavbild-2023-10-03-kl-163545.png "Bounding box shape")

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## Drawing tool

This geometry shape is drawn using **the** **bounding box tool**. The tool is used to mark the extreme points of objects such as vehicles, animals and pedestrians. 

### Drawing process

::::WorkflowBlock
:::WorkflowBlockItem
Select a class
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Place a point at the object's highest, lowest, rightmost, and leftmost point
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:::WorkflowBlockItem
After placing the last point, a bounding box should appear
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::Image[]{src="https://api.archbee.com/api/optimize/wLEz_RbWP6nIMpY-prjlm/GH0KDOG6Z9SqF2uqO8jQ-_bbox-2d.gif" size="50" width="844" height="402" position="center" caption="Placing points to create box" darkWidth="844" darkHeight="402" showCaption="true"}

### Drawing process with auto complete

If we can predict a bounding box at the target location, it will appear when you mouse over the object. If it is a bad prediction, you can simply press escape to hide and ignore it.

::::WorkflowBlock
:::WorkflowBlockItem
Select a class
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Hover the mouse over the target object, a prediction will appear
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Press tab to quickly accept the prediction
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::Image[]{src="https://api.archbee.com/api/optimize/wLEz_RbWP6nIMpY-prjlm/7GlQwdEolDOwCIQTCrI6m_tab-auto-complete2.gif" size="70" width="1540" height="943" position="center" darkWidth="1540" darkHeight="943" showCaption="false"}
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## Transformation controls

### Translate (change position)

Press anywhere inside the box to move it to another place. 

::Image[]{src="https://api.archbee.com/api/optimize/wLEz_RbWP6nIMpY-prjlm/8mduU83ObCCtxuGDIs0rH_move-bbox.gif" size="50" width="594" height="382" caption="Moving the box" position="center" darkWidth="594" darkHeight="382" showCaption="true"}

### Scale

You can edit the size of the box by dragging the corner control points or anywhere on the edges of the box.

::Image[]{src="https://api.archbee.com/api/optimize/wLEz_RbWP6nIMpY-prjlm/9h4lb43_3P-TqHefUkl90_scale-side.gif" size="50" width="594" height="382" caption="Scaling using the middle points" position="center" darkWidth="594" darkHeight="382" showCaption="true"}

::Image[]{src="https://api.archbee.com/api/optimize/wLEz_RbWP6nIMpY-prjlm/yL9g6pDSZqDryYADdIjaO_scale-corner.gif" size="50" width="594" height="382" caption="Scaling using the corner points" position="center" darkWidth="594" darkHeight="382" showCaption="true"}
:::

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## Reference line

Some tasks ask you to mark a line on the bounding box — for example to indicate a horizon, a ground contact line, or a split between two regions of the object. When a class is configured for this, the **Reference Line** tool becomes available, and the line you draw is stored as a property of the box.

A reference line always belongs to a bounding box and runs across the whole box, either vertically or horizontally. The orientation is fixed by the task — you place the line, you do not choose its direction.

::::WorkflowBlock
:::WorkflowBlockItem
Select the box you want to add the reference line to
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:::WorkflowBlockItem
Under property markings on the expanded object entry in the right-side menu select **Reference Line** to activate the tool
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Click inside the box to place the line
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To adjust it, drag the line along its axis: a vertical line moves left and right, a horizontal line moves up and down. The line stays within the box.
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## Shortcuts

- Enable the shortcut mode by pressing `ctrl` `arrow-up`
  - `shift` `ctrl` for Mac
- When one side turns green, edit the side using the `arrow keys`
  - Switch side by holding `ctrl` and pressing the `arrow-keys`

::Image[]{src="https://api.archbee.com/api/optimize/wLEz_RbWP6nIMpY-prjlm/KQczk6C8am_iQ6nlkb8uW_epbshortcuts.gif" size="66" width="680" height="398" caption="Editing a bounding box with keyboard shortcuts" position="center" showCaption="true"}

The sides will by default move one pixel, hold `shift` to move it five pixels at a time.
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***

## Related content

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:::LinkArrayItem
[Create connected 2D box](docId:8OxMj9RnUV9lI-8VH1Bdx) 
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[2D shape tracking](docId\:x9kkL6lO8G7pyatB5Nmla) 
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[2D machine-assisted tools](docId\:B1putYlvp306OO0rSvOtq) 
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