From Fedora Project Wiki
Input Methods
- In ibus-libpinyin, press "Ctrl-Shift-d" to remove the remembered user phrase; and in double pinyin mode, press "I" to use lua script extension.
- XKB option i.e. 3rd level chooser key is not available in control-center-3.22.0-1.fc25 Keyboard panel, one needs to use 'gnome-tweak-tool' to enable 3rd level chooser key