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# System prepended metadata

title: 'Geometry nodes: Viewer Group'

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# Geometry nodes: Viewer Group

Groups of nodes are capable of acting as preview nodes.

**Inspection node group:**
![](https://i.imgur.com/PTocUbr.png)

**Top level node group:**
![](https://i.imgur.com/uKVj3hg.png)

That is, if a group of nodes has an output node, then they can be used as preview nodes.

Main change: Ability to use fast connection.
The preview node operates from a more nested tree of nodes.

## Issues: How do I stop treating groups of nodes as previewable?
Is it possible tosay that if a group contains a preview group node, then it is also one?
How to stop the epidemic of preview nodes for all groups in the project?