## Documentation Index

Access the complete documentation index at:
https://www.zoho.com/en-fr/books/kb/llms.txt

Use this file to discover all available documentation pages before proceeding.

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# How do I create a custom function?

To create a custom function in Zoho Books:

*   Go to the _Settings_ in the top-right corner of the page.
*   Under the _Automation_ tab, click **Workflow Actions**.
*   On the Workflow Actions sidebar, select **Custom Functions**.
*   Click **\+ New Custom Function**.
*   Provide mandatory details such as the **Function Name** and the **Module** in which you want to create a custom function.
*   Now, enter or drag and drop your preferred parameters and conditions from the left sidebar of the script box. Once you complete the [deluge script](https://www.zoho.com/deluge/), click **Save**.

The new custom function will be saved, and you can set up a workflow rule with specific conditions to trigger it. Here’s how:

*   Go to the _Settings_ in the top-right corner of the page.
*   Under the _Automation_ tab, click **Workflow Rules**.
*   Create a new workflow and set the triggers based on which you want your workflow to be executed.
*   Click **\+ Add New Action** and select **Immediate Actions**.
*   From the dropdown, select **Custom Functions** and associate your custom function with it.
*   Click **Save**.

Whenever the set conditions are met, the workflow rule will be triggered, which in turn will execute the custom function.

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