A Platform Administrator creates a custom text area field on the Account object and adds...

In the Salesforce Lightning Experience, the Highlights Panel at the top of a record page is controlled by the Compact Layout. The compact layout determines which fields (up to 7) appear in the record header and in the hover-over details. To add a new custom field to this area, the Platform Administrator must go to the Object Manager for Accounts, select Compact Layouts, and either edit the existing primary layout or create a new custom one. After adding the custom text area field to the " Selected Fields " list and saving, the field will immediately appear in the Highlights Panel for users. It is a common misconception that the standard Page Layout editor (Option D) controls the highlights panel; while the page layout controls the " Details " section and " Related Lists, " it does not manage the header area. Option B might make the field easier to find in the details section but will not place it in the highlights panel.