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I think the flipping board button should be on the main screen.

Just that, it is a little annoying having to change screen to do something so basic as looking things from black perspective.
It is worse, at least on my computer, because it is out of screen. I have to scroll down to change page, up to switch, down to see the notation again and finally up one more time to get the whole board on the screen. On top of that the toggle stays below the "friends online" thing. It seems like a little thing but i use it all the time (analyzing, not playing).
Thanks for listening and the tremendous work you all are doing.