Change the look and feel of page layouts for custom and external objects.
|Available in: both Salesforce Classic and Lightning Experience|
|Available in: All Editions|
|To customize page layouts:||“Customize Application”|
|To view page layouts:||“View Setup and Configuration”|
From the management settings for the object whose page layout you want to edit, go to Page Layouts.
Complete one of the following.
If you have “Customize Application” permission, open the page layout that you want to customize for edit.
If you have the “View Setup and Configuration” permission, click the page layout that you want to view.