Translations:System Settings/Input Devices/9/en
To enable this feature, first make sure is enabled under tab. Then, check a key from tree. Finally, click . From now on, you will be able to use that key as Compose key.
To enable this feature, first make sure Configure keyboard options is enabled under Advanced tab. Then, check a key from Compose key position tree. Finally, click Apply. From now on, you will be able to use that key as Compose key.