These cover the whole window, but the top and bottom can open independently of one another.
For even greater control the shutter panels can in effect be split into two to cover the window recess with one panel sitting above the pther and this is known as tier on tier shutters. In general all panels are made with moveable slats so splitting the panel into two allows fantastic control over your privacy options.
You can, for example, leave the louvres in the bottom panel shut while angling the louvres in the upper panel to provide the level of light you require. Alternatively, you could just fold the upper panel out of the way so the upper window is totally free of a window covering.