> ## Documentation Index
> Fetch the complete documentation index at: https://docs.zeotap.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Configure the Hardcode Enricher

For every custom field, an enricher is mandatory and one of the options is the Hardcode Enricher. To know more about this enricher, refer to [Hardcode Enricher](/articles/unify-customer/enrichers-for-data-transformation-2816770049#hardcode-enricher).

Perform the following steps to configure the enricher:

<Note>
  **Note:**

  You cannot save the catalogue with custom fields, without applying an enricher. Once you have added this enricher, you cannot edit it.
</Note>

<Steps>
  <Step>
    Map the source field to the corresponding Zeotap Catalogue field.
  </Step>

  <Step>
    Click **+ADD A CUSTOM FIELD** for which you want to add the Hardcode enricher. You can add multiple custom fields as per your requirement.
  </Step>

  <Step>
    Click **+ADD ENRICHER** to configure the Hardcode enricher.
  </Step>

  <Step>
    Select **Hardcode Enricher** as the enrichment type.
  </Step>

  <Step>
    Under the **Hardcode Values** section make the appropriate selection to ensure that the value matches the data type of the mapped field.
  </Step>

  <Step>
    Save the changes.

    <Frame>
      <img src="https://mintcdn.com/zeotap/VC7TCWdAQcEWP1YP/articles/unify-customer/Storage/unify-customer/project-collect-customer/CD/attachments/3020357685/3034251285.png?fit=max&auto=format&n=VC7TCWdAQcEWP1YP&q=85&s=6a1e49d852214b5e3ff3fb237002cdce" alt="" width="3576" height="1866" data-path="articles/unify-customer/Storage/unify-customer/project-collect-customer/CD/attachments/3020357685/3034251285.png" />
    </Frame>
  </Step>
</Steps>

The screenshot above is an example to flag all the users ingested as part of the SMS stop list with the channel preference SMS Optin set as `No`. In this example, you can define a custom field and map it to the `SMS optin` target field in the mapping catalogue section for the marketing preference section and add a hardcode enricher with the value set as `No`.