In my emacs org-mode org file I have a tag list
#+TAGS: OFFICE(o) COMPUTER(c) HOME(h) PROJECT READING(r) PHOTOGRAPHY(p)
At some point, I wish to add a new tag to the list, and apply it to an item (using
C-c C-c). But the new tag does not show up in the list of selectable tags.
In order to fix this, I close and reopen emacs. But I'm sure that isn't necessary, How do I refresh this list without restarting emacs?