On Thu, Aug 2, 2018 at 6:22 AM, Tim via users <users@lists.fedoraproject.org> wrote:
   2. Laboriously go into the edit menu (at the top of the window,
      presuming you're not using a desktop manager that has removed the
      feature), and pick PASTE from the EDIT menu.

It'd be nice if you could simply add CUT, COPY and PASTE icons into the
file browser's toolbar, to quickly do those *very* common functions.

The problem is that I'm using stock F28 with default Gnome 3 and, as it can be seen from my screenshot, there is no "PASTE" option in the menu (what exposed clicking the 3 horizontal lines icon):
I only have:
- new folder and new tab buttons (+ "bookmark this location" button that is grayed out)
- zoom in/out buttons
- undo and redo buttons that are grayed out
- Visible Columns...
- "show hidden files" checkbox
- Reload

So your hint and gnome documentation for which I provided the link seem not accurate, or Fedora 28 has done some customization to the menu of "Files" application