Microsoft Ribbon More button of some sort?

1. How we can add more button in ribbon bar?
2. How do I expand the ribbon sections in Outlook?

How we can add more button in ribbon bar?

On the ribbon, select the appropriate tab or group to display the command that you want to add to the Quick Access Toolbar. Right-click the command, and then select Add to Quick Access Toolbar on the shortcut menu.

How do I expand the ribbon sections in Outlook?

Collapse the ribbon or expand it again

Double-click any of the ribbon tabs or press CTRL+F1 to collapse the ribbon if you need to see more of your document. To see the ribbon again, just double-click any ribbon tab, or press CTRL+F1.