What is the hotkey to switch between a concert pitch view and a transposed part view? I like to be able to double check things when I am tired so I like to be able to flip views in scores.
There aren’t any default shortcuts, but you can define your own. Edit > Change Layout Transposition > Concert Pitch or Transposing Pitch, in Edit > Preferences.
(Use the search option in Preferences to find this sort of thing - e.g. type “concert” in the search box).
Instead of shortcuts for Concert and Transposing, I use a shortcut for “Toggle Layout Transposition.” By using the toggle I only have to remember one shortcut to switch to whatever is not the current display.