Oh wow, I never knew! Guess I never read the manpage either.

Try B for bold, 1 to expand/collapse CPUs. And finally save the config file with W.

https://xkcd.com/1053/

i always press z, x, c, s, 1, <enter> and shift+w to save. I used to color code different servers, but there's only so many combos (like 5) that are easy to read.