> For the complete documentation index, see [llms.txt](https://docs.imerit.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.imerit.net/labeling/labeling-tools/relation/group-relation.md).
# Group Relation
Overview of the Group Relation tool in Ango Hub
The Group Relation labeling tool allows you to create a relation between two or more annotations.
{% hint style="info" %}
The Group Relation tool is supported across the Audio, Image, Video, DICOM, PDF, and Text labeling editors.
{% endhint %}
### How to add a Group Relation tool to your project
From the project’s *Settings* tab, enter the *Label Set* section.
Click on *Add Category*. From the list that appears, click on *Group*.
A new row will appear named *Group*. Click on it to expand it.
Give your group relation tool a title and description.
Enable the *Required* toggle if you want to force labelers to create a group relation for each asset. When the toggle is disabled, labelers will be able to save and move to the next asset without creating the single relation.
## How to Draw a Single Relation
There are two ways to add a group relation in Hub.
1. Click on the first label to include in the group relation. Then, shift-click on all other annotations you wish to include. Right-click on any one of them, and select your group relation under the *Grouping* menu item:
2. Click on any one of the *Group Relation* tools you have created from the *Tools* section on the left of the screen. Then, left-click on all annotations you wish to include. Press "N" on your keyboard when you are done to close the group relation.
{% hint style="info" %}
If you wish to add an annotation to more than one group relation:
1. Hide the relation it is currently part of by pressing "H" on your keyboard.
2. Add the annotation to the second group relation.
3. Press "Shift + H" to unhide all relations.
{% endhint %}
---
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