There's a way to make `^q` quit `less` and not clear the screen (like `less -X`), while `q` quits `less` and clears the screen (like normal `less`).

1. Do `echo '^q toggle-option -redraw-screen\nq' >> ~/.config/lesskey`

2. Make sure `less` is invoked without `-X` (or with `-+X` if you want to be sure).

This `^q` command is particularly useful for `git log` output and other things where you might need to refer back to them in the next terminal command you do. (In fact, `git` uses `less -FRX` by default, so you'd need to override its config to use `less -FR` instead for the above to work as intended). The `q` command is useful when you don't want to lose what you had on the screen before invoking `less`.