Customize the Touch Bar on MacBook Pro
In the Finder and in many apps, such as Mail and Safari, you can customize the buttons in the Touch Bar. You can also customize the Control Strip. Choose View > Customize Touch Bar to add, delete, or rearrange items in the Touch Bar.
When you’re customizing the Touch Bar, the buttons jiggle. For example, here’s the Calculator Touch Bar, ready to be edited:

Add buttons to the Touch Bar. Drag controls to the bottom of your screen and into the Touch Bar to add them.

When you finish, click Done on the screen.

Rearrange buttons in the Touch Bar. While customizing the Touch Bar, drag buttons to a new location. When you finish, click Done on the screen.
Remove buttons from the Touch Bar. While customizing the Touch Bar, drag a button from the Touch Bar to the screen to remove it. When you finish, click Done on the screen.