I saw the references to a keyboard shortcut dialog in the source code years ago, couldn't figure out how to make it show up (despite looking at the code to try to work out how it's triggered) and concluded it had never worked. This is literally the first time I've seen anyone else mention it.

In T360880#9658479, @Nikki wrote:

I saw the references to a keyboard shortcut dialog in the source code years ago, couldn't figure out how to make it show up (despite looking at the code to try to work out how it's triggered) and concluded it had never worked. This is literally the first time I've seen anyone else mention it.

Yeah, I don't recall being aware of this either prior to reading about it in T245643. Though, when trying it out, I notice that it reliably does work when skipping the second and third step above, that is, doing only:

• Go to https://query.wikidata.org/
• Press Esc to unfocus the editor
• Press ?

OK thanks so much Michael, I was unable to find it as well
Just adding a screenshot here for reference