The View tab: Use these commands to change the Outlook layout for conversations, the message preview, the Reading pane, the ...

You can also set the view to track your computer’s global ... but it’s in a different tab. If you use Outlook on your desktop device, you can customize your sidebar settings.

Select the File tab and then from Backstage View, select the Options category. The Outlook Options dialog box appears displaying various options. When done, press the OK button to return to Outlook.