Huawei WATCH 2 Faq page 4

Press the watch's upper right key (power key) to access the app list, touch and open the
Battery app, then select Smart power saving mode.
Tip: when Smart power saving mode is enabled, the watch will disable the Always-on
screen function, the mobile network will switch to automatic mode, and the screen
brightness will be lowered.
(3).Block notification messages
After the watch receives a notification message, press and hold the screen and select
Block all notifications to block all further notification messages from this app.
Alternatively, enter the Android wear App, touch the Settings icon to enter the Settings
screen, then under Block app notifications add the apps that you do not want to receive
notifications from.
Tip: Your watch will not receive notifications from apps whose notifications are blocked.
(4).Use the watch's Airplane mode
If you find yourself not needing a network connection (for example, when you are on a
plane, asleep, or exercising for extended periods), switch the watch to Airplane mode. To
enable Airplane mode, pull down the shortcut menu and touch the airplane icon.
Tip: In Airplane mode, Bluetooth and network connection are disconnected. You will not
be able to make or receive calls, send or receive messages, or use any online functions.