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# 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/-/c/9/f/6/c9f6001b0450e000/1e452f84-a331-4752-8ccf-99313e_12kfxef.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/-/c/c/6/4/cc648c41b2ab3800/1460055a-03fd-405b-a50b-b0b065_117oxqt.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.