GNOME Bugzilla – Bug 737070
gnome-user-docs may be refering to screen mirror GUI component incorrectly.
Last modified: 2014-09-22 10:08:43 UTC
I think that the look-display-fuzzy.page refers to the setting as <gui>Mirror Displays</gui> when in reality it is nowadays referred to as "Mirrored".
Thanks for the report. I reviewed the page and pushed the change to master as 20a8720068d67a9e67891693191dea5266cb220f.