Hi, I have been reading up on my new Nikon Z7ii mirrorless camera but have been unable to find out how to close the shutter curtain while I change lenses. I have read the manual and looked in a Nikon book but see no mention of it. Currently, when I swap out lenses the sensor is right there - exposed. During events like a football game or other outdoor activity, it has caused the sensor to get dust and water drops on the sensor. There must be a way to activate and close the shutter curtain so that the sensor is protected during a lens swapping session. How do you close the shutter curtain so when you remove the lens the sensor is covered vs exposed?