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          Page Layout Limitations

          Page Layout Limitations

          Keep these limitations in mind when working with page layouts in the enhanced page layout editor.

          Required Editions

          Available in: both Salesforce Classic and Lightning Experience
          Page layouts available in: all editions
          Creation and deletion of page layouts available in: Professional, Enterprise, Performance, Unlimited, and Developer Editions

          Page Layouts

          • If you’re using Salesforce Professional Edition, you can’t rename a page layout.
          • You can drag up to 20 s-controls, 20 Visualforce pages, 20 expanded lookups, and 100 related lists onto a page layout. There are no limits on custom links.
            Note
            Note You can’t place a Visualforce page more than one time on a page layout.
          • In Lightning Experience, page layouts support up to 55 lookup fields. In Salesforce Classic, page layouts support up to 40 lookup fields.
          • Don’t add more than four external lookup fields to your page layout. On Lightning Experience record pages, a Record Detail component that contains more than four external lookup fields breaks the page at runtime.
          • You can add one dashboard per page layout.
          • Page layouts for the user object only include custom fields, custom links, s-controls, and Visualforce pages. Tagging, related lists, custom buttons, and standard field customizations aren’t included on page layouts for the user object. Also, field-level security is only available for custom fields on the user object. Only standard Chatter actions appear on the user profile page, regardless of which actions are assigned to the User Page Layout or the global publisher layout.
          • You can edit only certain attributes when you’re working with a page layout that was installed from a managed app. Some changes that you make to managed page layouts, such as adding components, work when you’re editing the page layout but aren’t reflected on the record detail page.
          • Chatter group layout changes affect the Salesforce mobile app only. Changes to the group publisher (actions and layout) reflect in both the full Salesforce site and the Salesforce mobile app.

          • Custom fields installed from a managed package aren’t translated when they appear in the page layout editor.
          • Due to third-party cookie restrictions in modern web browsers, Visualforce pages embedded in page layouts sometimes don't render properly in Salesforce Classic. See Embedded Visualforce page not displayed in record page layout in Classic UI.

          Related Lists

          • A page layout can have up to 100 related lists.
          • The View All button only displays up to 2,000 items in a related list.
          • You can’t add related lists to the page layouts for the User object.
          • You can include up to 10 fields per related list.
          • In Lightning Experience, the related list type determines how many fields are displayed in a related list. The Basic List related list type displays only the first four fields of a related list. The Enhanced List type shows up to 10 fields, lets you resize and sort columns, perform mass actions, and wrap text. To change the related list type, customize the Related List–Single component or the Related Lists component in the Lightning App Builder.
          • Users can’t drag documents to add them to Files or Notes & Attachments related lists when the related list type is Basic List.
          • You can’t move the first field of a related list, because it’s a unique identifier for the record.
          • You can add custom fields of the long text area type to a related list. However, you can’t add some standard fields of the long text area type. For example, you can’t add the Description field on an Opportunity to a related list.
          • The default sort order varies per record. The Sort By dropdown isn’t available for activities and opportunity products.
          • Lookup fields aren’t available for display on their corresponding lookup related list. For example, the case lookup field on an account page layout isn’t available when editing the cases related list.
          • You can’t customize the History related list because it links to data stored elsewhere.

          Mini Page Layouts

          • You can’t choose Mini Console View for the Close Case layout, Log a Case page, or View Cases page layouts on the Self-Service Portal. You can’t choose Mini Console View for opportunity team page layouts.
          • You can’t define mini page layouts for the Close Case layout, Log a Case page, or View Cases page layouts on the Self-Service Portal. You can’t define mini page layouts for opportunity team page layouts.
          • You can define mini page layouts for the user object; however, you can’t add standard fields or related lists. Also, a customized mini page layout won’t display in the Agent console.
           
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          Salesforce Help | Article