Huawei MATE 9 User Manual page 178

Touch or drag to choose
system language
Touch to add language
Toggle upper
and lower case
Enter numbers
and symbols
Touch to enter comma or
touch and hold to open
input method settings
Touch to enter space
or touch and hold to
select input method
Touch to remove
preferred language
System language
Switch between upper
and lower case
Backspace
Touch to enter period
or touch and hold to
select other symbols