Question marked as Best reply User profile for user: stedman1 stedman1 Community+ 2024 User level: Level 10 257,658 points Dec 25, 2019 3:10 AM in response to len1888 The Apple Books links below may help. MacBook Air Essentials on Apple Bookshttps://manuals.info.apple.com/MANUALS/1000/MA1846/en_US/mba-13-2018-macos-catalina-qsg.pdfhttps://manuals.info.apple.com/MANUALS/1000/MA1845/en_US/mba-13-2018-macos-catalina-info.pdf Show more Less Reply Link