Huawei MATE 9 Use Manual page 29

Deleting home screens
1
On the home screen, pinch two fingers together to open the home screen editor.
2
Touch on a blank screen to delete it.
You cannot delete a home screen if it contains apps or widgets.
Moving home screens
1
On the home screen, pinch two fingers together to open the home screen editor.
2
Touch and hold the home screen you want to move and drag it to the desired location.
Setting the default home screen
1
On the home screen, pinch two fingers together to open the home screen editor.
2
Touch at the top of a home screen to set the chosen home screen as default.
Screen and Display
23