> For the complete documentation index, see [llms.txt](https://doc.wearepatchworks.com/product-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.wearepatchworks.com/product-documentation/process-flows/cross-reference-lookups/installing-cross-reference-lookups.md).

# Installing cross-reference lookups

## Introduction

Before a standard Patchworks **cross-reference lookup** can be [applied in field mapping transformations](/product-documentation/process-flows/cross-reference-lookups/using-a-cross-reference-lookup-in-field-transformations.md), it must be installed. Follow the steps below to complete this task.

## The steps

<details>

<summary><img src="/files/JOYoP4EdSu7WJ3CMdAAS" alt="" data-size="line"> Show me</summary>

![](/files/ahehdCFMy125wq6Nv7Qa)

</details>

**Step 1**\
Log into the Patchworks dashboard, then select **process flows** <mark style="color:orange;">\~</mark> **cross reference lookups** from the left-hand navigation bar.

**Step 2**\
Move down to the **marketplace** section and find the cross reference lookup that you want to install - you can use the search field or step through pages to find your required item. For example:

<figure><img src="/files/4vnab8sBA27LhGCubqdk" alt=""><figcaption></figcaption></figure>

**Step 3**\
Click the **install** button associated with the cross-reference lookup that you want to use. The item is installed and added to your **installed** section at the top of the page. This cross-reference lookup is now [ready for use](/product-documentation/process-flows/cross-reference-lookups/using-a-cross-reference-lookup-in-field-transformations.md).