How could one show the wrting tool bar in "Full Screen"?

How could one show the wrting tool bar

in “Full Screen”?

Can one open more than one window (e.g. in “Full Screen” mode) of the same document?

You don’t. Full Screen is specifically designed to be distraction-free – that is, you don’t have the toolbars, menus, and other panels in place.

Having said that, if you move down to the bottom of the screen you’ll have a pull-up where you can activate other windows like the Inspector and change some aspects of Full Screen view.

You can also access most of the options on the writing toolbar by right-clicking on your text. As far as I know, though, display of the writing toolbar is not an option under Full Screen mode.

Alright, thank you very much, Devin!