nautilus window has few files in "List view" (as opposed to "Grid view"), it is easy to click on an empty spot at the bottom of the list to get the context menu and find New Folder item and the New Document submenu. However, when there are enough items in the folder to fill up the entire height of the window, it is not possible to get the same context menu. One would have to switch to "Grid view" (CRTL + 1) to find an empty spot and then do right click on an empty spot to get the proper context menu.
Of course, to get an empty folder one can always do SHIFT + CTRL + N, regardless of the view, to get the new folder. However, there is no such shortcut, that I know off, to get the New Document submenu.
Note that to quickly get to all the shortcuts in
nautilus you can just do CTRL + F1. You will see that on page 3 (Ubuntu 18.04) there is the "Editing" section with the shortcut for New Folder but none for New Document.
Anyone knows how one can create a shortcut directly to that submenu?