Huawei MATE 9 Use Manual page 30

Managing home screen widgets
Add, move, or delete widgets from the home screen.
Adding widgets
1
On the home screen, pinch two fingers together to open the home screen editor.
2
Touch Widgets. Select a widget and drag it to a blank area on the home screen.
You must have enough space on the home screen. If there is not enough space, add
another home screen or free up some space.
Screen and Display
24