# Version History

## Restoring old versions

By default, we will store a new version of your Model for **every** change that you make. You can use [**Undo**](/using-taglo-software/the-taglo-interface/save-undo-redo.md) to quickly undo changes, but to access old versions more easily, you can use the **History** panel in the Model preview in the Home Tab.

The History panel shows you all available previous versions of the Model, with the date and time at which they were created. For each version, you have the option to **Restore as new**, or **Restore**.

**Restore as new** will create a new Model, starting at the restore point. **Restore** will overwrite the current version with the previous, ***so use this option with care***.

<figure><img src="/files/XFmcJMWSoauQdXNprakf" alt=""><figcaption><p>History Panel</p></figcaption></figure>

## Reducing history size

If you want to reduce the size of the version history on disk, you can run a clean up of old files, by clicking on **File > Clean old files** in the Home Tab.

This will keep one version per day for all Models, and delete all other versions. Currently, **Clean old files** can only be used across all Models simultaneously.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://help.taglo.io/models/home-tab/version-history.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.