> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.fotostudio.io/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# How to create my own variables?

In addition to the variables we offer in Fotostudio, you can **create your own variables** to use in your emails and contracts.

To start, you need to create a new custom field in [Settings > Modules > Custom Fields](https://www.fotostudio.io/app/custom_fields).

||| To learn more about custom fields, see the __Custom Fields__ category.

![Create a custom field](https://storage.crisp.chat/users/helpdesk/website/1106822c7ec6b200/screenshot-2024-02-05-at-14064_1hnea0z.png)

When creating this field, you will find a _"Variable"_ option to activate in order to associate a variable with this custom field. The variable will have a format {custom_XXX}.

![Custom variable](https://storage.crisp.chat/users/helpdesk/website/1106822c7ec6b200/screenshot-2024-02-05-at-14253_2fp5aq.png)

You can then use this variable in your emails and contracts, and it will be automatically replaced by the content of the field that is associated.