The Themed Greeter is a greeter interface that takes up the whole
screen and is very themable.  Themes can be selected and new themes
can be installed by the configuration application or by setting the
GraphicalTheme configuration key.
The look and feel of this greeter is really controlled by the theme and
so the user interface elements that are present may be different.  The
only thing that must always be present is the text entry field as
described above in the GTK+ Greeter.
You can always get a menu of available actions by pressing the F10 key.
This can be useful if the theme doesn't provide certain buttons when
you really wish to do some action.
