Floor-to-ceiling window in the attic

Hello, we have a dormer in the attic with a floor-to-ceiling window (about 1.40m high x 2.40m wide). We are now considering which window to install there. The nicest option would probably be to simply use a fixed panel, since the window area is limited anyway. The problem would be that the window frame starts at a height of about 6.50 m on the outside and would therefore be difficult to clean from the outside. An alternative would be to install a double-wing window with a glass fall protection. What do you think?

Hello, we have a dormer in the attic with a floor-to-ceiling window (about 1.40m high x 2.40m wide).

That sounds more like a transverse dormer to me. Would it hurt to illustrate the question?

Yes, it is by definition a dormer gable. Here is a photo from the inside at an earlier stage, the sides are now closed, I don't have anything more available at the moment. We would like to set up a reading area there.