---
title: Custom Field Definitions
description: Sometimes the data fields presented as defaults in the various tables are not enough for a specific task. We allow you the ability to add your own custom fields to many tables through a utility. These custom fields can be…
url: "https://docs.pertexa.net/docs/custom-field-definitions/"
updated: "2021-02-26"
category: Practice Management
---

# Custom Field Definitions

Sometimes the data fields presented as defaults in the various tables are not enough for a specific task. We allow you the ability to add your own custom fields to many tables through a utility. These custom fields can be used in queries, however, they are not available for use by the rules engine.

Example of a new field created in the Persons table:

![](https://docs.pertexa.net/wp-content/uploads/2021/01/PM15.png)

How it Appears in the Registration Interface

![](https://docs.pertexa.net/wp-content/uploads/2021/01/PM16.png)

How it Appears in the Registration Query function

![](https://docs.pertexa.net/wp-content/uploads/2021/01/PM17.png)