The Touch Bar will show different features depending on what it's being used for. For example, when composing text in something like Word or Google Docs, the Touch Bar can offer word suggestions as you compose. When in Messages, you can use the rectangular panel for browsing emoji. Because the bar supports multi-touch, users will be able to press on one side and slide on the other for easy access to added options. Holding the Macbook Pro's function key will bring back the F1-F12 function keys.