This is a closed window.
The handle is pointed down.
This window is opened all the way (there are no screens on the German windows - and it is dark outside:)
The handle is horizontal
This window is opened at the top, or flipped up.
The handle is pointing up.
The photo on the left is showing you a roladen. (It is not pink, it is really white, when I brightened the photo, it distorted it a little.......) When it is up and opened (meaning, you can't see it) it is stored above the window inside the wall. When the roladen is down, it comes down on the outside of the window. To raise or lower the roladen, you use the strap shown located to the right of the window. When you put the roladen down, you can leave it to where there are these little gaps, they will let in some light.
Or, you can close it all the way, there will be no gaps and no light will come in. It is very nice when it is cold, windy, or very light at 10pm or 5am. Closed all the way, pictured below.
