So I was watching this movie the other night for the first time and the one thing that stood out to me and I thought it was really cool. Was the piece of glass towards the bottom of the window and at one part of the movie it was raining really hard and they close the windows a little bit, but then I realized that piece of glass at the bottom would prevent any rain from getting in as long as the window is not fully open.
But does anyone know what the piece of glass is called and also why have I never seen this before and why does this not exist in more places?