# Configure the Case Compare Page Layout

You can customize the _Case Compare Page_ to specify how Vault displays data on the following pages: 

* <a href="/en/gr/826980/">**Inbox Item to Case Compare**</a>: Allows users to compare data between a current _Inbox Item_ and a matched record.
* <a href="/en/gr/735242/">**Case Version Compare**</a>: Allows users to compare data between different _Case_ versions or _Cases_. 

## Customize the Inbox Item Follow-Up Case Compare Layout

To access the _Case Compare Followup_ layout, navigate to **Admin > Configuration > Pages > Case Compare Page > Case Compare Followup**. In the listed page _Sections_, the _Default Filter Options_ section controls the default filters that are enabled each time the page is loaded. We recommend showing new and modified as a base but you may want to show more detail by default. All other page sections correspond to sections with fields on the layout.

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      <p><strong>Note</strong>: We recommend including the <em>Duration (status)</em> and <em>Type</em> fields in the <em>Adverse Event</em> section. If you do not do this, Vault incorrectly indicates records with matching and missing values as modified on the <em>Inbox Item to Case Compare</em> page.</p>
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### Customize Fields

You should include all fields that require manual review so users can decide if they want to apply or ignore those field values. If your Vault uses <a href="/en/gr/832805/">Rules Based Narratives</a>, ensure you display the _Narrative Preview_ field so users can select which narrative to include when they promote to Case. Users cannot select the <a href="/en/gr/826980/#accept">_Accept Change_ checkbox</a> for the _Narrative Preview_ field for <a href="/en/gr/01212/">template-generated narratives</a>.

To customize fields displayed on both pages:

1. On the _Case Compare Followup_ page, select the section to which you want to add or remove fields.
2. Select **Edit**.
3. Add or remove the **Fields** as applicable. 
4. Optional: Drag and drop fields to modify the order they appear on the layout.
5. Select **Save**.

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      <p><strong>Note</strong>: For the <em>Inbox Item to Case Compare</em> page, Vault uses all non-displayed fields for data merging, regardless of which fields you configure to display on the pages.</p>
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### Layout Considerations

Consider the following as you customize the layout:

* You can add both custom and standard fields to the layout.
* Do not add _Reason Omitted_ fields to the layout.
* You cannot add the same field to multiple sections.
* Vault cannot merge lookup or formula fields.
* You cannot add custom _Case_ child object sections to the layout. Vault copies any custom child records to the new _Case_ version, though the custom child objects are not visible to users on the page.
* Vault copies up to two custom child objects and up to 100 records per custom child object to the new _Case_ version.

## Configure User Permissions

The following user permissions and security apply to the _Case Compare Page_ page:

* Users must have _View_ access to the _Case Compare Page_ in their <a href="/en/gr/23647/">permission set</a>.
* If your Vault uses <a href="/en/gr/47850/">Atomic Security for objects</a>, users can only view and merge object field values to which they have _Read_ access. 
* If users are missing _Read_ permissions at the field or object level, fields adhere to their default promote to follow-up behavior on the _Inbox Item to Case Compare_ page.
* The audit log records updates as performed by Vault.