Steps to Reset Navigation Pane from the Outlook user interface menu. Select Outlook > Preferences > General.Show or hide the sidebar (folder pane) Select View > Sidebar. Show or hide the ribbon Select View > Ribbon. View messages from multiple accounts Select All Accounts in the upper left, and then click Inbox. Hover your mouse near the top of the screen to make the menu bar visible, or click the green button at the top left to leave full-screen mode. If you don't see the menu bar, you're probably in full-screen mode. Outlook for Office 365 for Mac Outlook 2016 for Mac Outlook 2019 for Mac Contributors: Last updated: MaMost customization options are available on the Outlook menu bar and ribbon. Outlook For Mac Folder Pane Missing 9,4/10 7955 votes
