The editor's selector shows the accounts you selected in the Account Center. Your favorite accounts appear first, with a star. If you see a message saying no accounts are selected, first confirm that your Meta account is connected under Connect Meta in the side menu. Then open the Account Center and select the ad accounts you want to use. Back in the editor, click the Refresh button (next to Search account) to reload the list without losing your current selections. Tip: the Privacy button in the same area hides account names on the screen, which is useful for recording tutorials or sharing your screen with clients.