I have long been confused by the Discourse search box “options” tab, which I expected to function as the “advanced search” in vBulletin, and provide GUI options to narrow the search. “Help” would be a less confusing term, IMHO. Sure, if you’re using a mouse, you click on it and see a help menu, but if (like me) you’re a keyboarder, it doesn’t work like that.
Use / to open the search box.
Type in your search term.
Tab to “Options” in the mistaken belief that this is not a help menu.
Enter
Even though the focus is apparently on the “options” link, It doesn’t open; instead, Discourse executes the search.
I had no idea there even was a search help menu until @cpradio enlightened me a few days ago.