I’ve never seen anyone detail it, but from usage it seems clear that behind the graphical presentation of the keyboard there are touch zones for each key that a

I’ve never seen anyone detail it, but from usage it seems clear that behind the graphical presentation of the keyboard there are touch zones for each key that are bigger or smaller than the actual key and probably grow and shrink depending on the previous letter(s) typed. Maybe newer versions don’t do it (or as much) but I actually thought the direction of the article was that he would hide the fact that 2-3 letters were on the same key.