How can I display the details of a related object using a subtab in Application Composer?

You can add a subtab from the Pages option of an object in Application Composer.

Navigate to Application Composer and do the following:

1. Expand the object where you want the subtab to appear and click Pages.
2. In the Application Pages tab, click the related Details Page Layout.

3. In the listed subtabs, scroll down to the end of the subtabs and click the Add icon.

   You can select from the following types of subtabs:

   • Related object

   • Child object

   • Context link

   • Common component

   • Mashup content

4. After selecting the type of subtab you want, follow the steps in the UI to configure it as per your requirement.