I focus the message body area and underneath my cursor appears
the message “Press / for Help me write”.
I had been using Chrome for just Gmail, because of Gmail's sabotagey hostility toward Firefox. On my 10+ machines I swapped Chrome for Bromium, ungoogled Chromium, Brave and a couple of others I don't recall.
We both use Chrome (she on Windows, me on Mac), but I could totally believe that I've turned off some shiny AI feature _in Chrome_ that she hadn't.
Anyone care to confirm or disprove the hypothesis that there's some setting in Chrome itself that will disable this Gmail feature?
In a Firefox fork (Floorp) using another Google account but with the seemingly relevant part of Gmail configuration matching, I don't see "Press /" at all. Not sure why exactly, it's a somewhat interesting question but I already went poking through dev console to write a selector for it and I'm starting to get irritated at the idea of spending any more time on it, lol
uBlock:
mail.google.com##div[aria-label="Message Body"] span[contenteditable="false"]
div[aria-label="Message Body"] span[contenteditable="false"] { display: none !important; }