Touch typing is an automatic finger movement rather than recalled knowledge of the layout. Why highlighting the next key gets in the way, where the method of unfolding the movement came from, and how practice turns movement into automatism.
Typing speed hits a ceiling not from lack of effort but from what gets repeated: glances down, uneven rhythm and corrections cost time that effort cannot win back. What actually keeps the plateau in place, and what moves it.
Looking down is how you find a key your hand doesn't know the way to. Why key covers and blank stickers help so little, what replaces the glance, and how to leave the habit without a long collapse in speed.
Eight fingers rest on ASDF and JKL;, and the hand finds this position by the bumps on F and J — without looking. Which finger presses which key, why the return home matters more than the reach, and what actually makes this arrangement fast.
Why keys refuse to stick in memory, what to do when fingers lose the home position or the wrong finger keeps reaching out, how to treat tired pinkies, and a ladder of exercises from the first placement drills to rhythm work.