> For the complete documentation index, see [llms.txt](https://docs.justransform.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.justransform.com/development/mapper-and-map-chains/mapper/updating-a-map.md).

# Updating a Map

To update a Map within Justransform, click "**Open**" within the Mapper Module. 

<figure><img src="/files/WgeViHjKHxv0CtBnAtI0" alt=""><figcaption></figcaption></figure>

1. Select the Map file to open.
2. Click "**Open**"

For Information on adjusting your Map file, follow our guide on creating a map.

{% content-ref url="/pages/mnpSHDhIDof2VIcKGyvF" %}
[Creating a Map](/development/mapper-and-map-chains/mapper/creating-a-map.md)
{% endcontent-ref %}