1. Create a record page or open an existing one in the Lightning App Builder.
2. If you opened a record page that is ready for your users and doesn’t need editing, click Activation.
3. If you created a page or opened a page that needs adjustment, make the necessary changes, click Save, and then click Activate.You have a few options for activating a record page.Make the page the org default for the object.Make the page the default object record page for specific Lightning apps.Assign the page to a combination of Lightning apps, record types, and profiles.
4. Make the page the org default for the object.
5. Make the page the default object record page for specific Lightning apps.
6. Assign the page to a combination of Lightning apps, record types, and profiles.
7. On the activation screen, click the tab for the option you’ve chosen, and follow the steps to activate the page.TipYou can see which record pages are activated for which Lightning app in the Lightning Record Pages related list in the Object Manager.If you no longer want a page to be an app or org default, redo the activation process for the page, and select the option to remove it as the default.If you activate a page and then return to make changes, you don’t have to activate it again. Clicking Save after you make your edits pushes the changes to your users.
8. You can see which record pages are activated for which Lightning app in the Lightning Record Pages related list in the Object Manager.
9. If you no longer want a page to be an app or org default, redo the activation process for the page, and select the option to remove it as the default.
10. If you activate a page and then return to make changes, you don’t have to activate it again. Clicking Save after you make your edits pushes the changes to your users.