System preferences

Dock, keyboard, trackpad, mouse, screenshots and the computer's name, one line each.

What you’d otherwise click through in System Settings is a line in config/:

# config/dock.conf
dock visibility hidden

# config/trackpad.conf
trackpad tap-to-click true
trackpad three-finger-drag true

Setting	Values
`dock visibility`	`always`, `autohide`, `hidden`
`keyboard repeat-rate`	a number; lower is faster (System Settings stops at 2)
`keyboard repeat-delay`	a number; lower is shorter (System Settings stops at 15)
`keyboard press-and-hold`	`true`: holding a letter shows its accents; `false`: it repeats
`trackpad speed`	`0.0`–`3.0`
`trackpad tap-to-click`	`true`, `false`
`trackpad three-finger-drag`	`true`, `false`; moves three-finger swipes to four fingers
`mouse speed`	`0.0`–`3.0`
`mouse secondary-click`	`right`, `left`, `off`
`mouse natural-scrolling`	`true`, `false`; macOS applies it to the trackpad too
`screenshot save-to`	`clipboard`, `desktop` (macOS’s default), `preview`
`system hostname`	letters, digits and hyphens; from `$hostname` in `dot.toml`

dot explain <topic> prints each one with its values, and the settings reference has them all.

Good to know

Some changes need a new session. Keyboard and trackpad changes take effect after you log out and back in; apply says so when it applies one.
Some need your password. system hostname sets all three of macOS’s names for the computer, which needs sudo; check shows it as (sudo) and apply asks.
Accents on a US keyboard. With keyboard press-and-hold true, holding a letter shows its accents. In any app, including the terminal, ⌥ e then a vowel gives á é í ó ú, and ⌥ n then n gives ñ.

Add it as a setting of your own: Add a setting.