Apple Watch doesn't have a button. Apple Watch has two buttons, one is round and the other is cuboid. Apple Watch's round buttons are also called crowns, which have many benefits. If you click on it, you can directly check the dial of the watch. You can go straight back to the last page by pressing it twice. If you hold it for a long time, you can support (Siri) function. If you rotate it, you can zoom (picture, file).

Other functions of Apple Watch specifically include:

Draw it: Watch, like mobile phone, always occupies the largest area, and it is also the first screen you see. Pull down on the Apple Watch screen and you will see a list of notifications, just like the iPhone. You can see missed calls, messages, application notifications and so on. Users can click to view information, or swipe to erase information from the screen.