I´d appreciate to have both the Layout and the MaterialEditor window as a Tab, besides the Tabs for the 4 Views.
It could be an option in the settings to choose from.
I think this would be useful as I´m mostly working in a fullscreen window, and when choosing either of the features, the Fullscreen Desktop moves everytime, adding another fullscreen window.
Interesting. I agree this would be useful. Logged in MR-2787.
The new macOS Sierra will have more “native” support for tabs that OS X currently supports. We will look into whether or not this system might lend itself to tabs of multiple views into the same document.