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# Edit custom fields in custom object definitions

> Learn how to edit an existing custom field definition in a custom object definition.

Learn how to edit an existing custom field definition in a custom object definition.

Navigate to **Object manager entry** in the left navigation.

Click the name of the custom object definition with which the custom field is associated. The custom object detail page opens.

Locate the custom field you want to edit, and then click the Edit icon *(edit gray icon)*.

In the Edit Custom Field dialogue, make any of the following updates:

* Update the default value.
* Change a required field to optional.
* Change an optional field to required if the custom object contains no record.
* Change a filterable field to non-filterable, and vice versa.
* Remove the unique constraint on the field.
* Add a unique constraint to a filterable field if the custom object contains no record.

Click **Save**. Zuora updates custom field definitions asynchronously. See [Monitor custom field jobs](/docs/platform/extensibility/custom-fields/custom-field-management-with-the-object-manager/monitor-custom-field-jobs) for how to monitor job status and completion.