To do so, just hold down the Option key when you click on one of the tabs at the top of the window, and that collection of settings will open in its own Inspector.
Use the tabs across the top to access more settings, each in its own window (if you’d like).
This also works in Numbers and Keynote, thank goodness. It’s this kind of stuff that keeps me sane. And really, that’s such a fine line for me that every little bit helps.