Like this, by word of mouth. That’s how Apple has done UI design since they stopped printing paper manuals.
- ctrl-shift-. to show hidden files on macOS
- pull down to see search box (iOS 18)
- swipe from top right corner for flashlight button
- swipe up from lower middle for home screen
> I have a gesture for whoever decided "find in page" should go under share.
You can also just type your search term into the normal address bar and there's an item at the bottom of the list for "on this page - find <search>". I'd never even seen the find-in-page button under share.
Not restricted to Apple, but TIL: Double-clicking on a word an keeping the second click pressed, then dragging, allows you to select per word instead of per character.