Replying to these two questions:
these 4 lines of code give you an ersatz of distraction-free typing mode:
set-face window LineNumbers black set-face window LineNumberCursor black set-option window modelinefmt '' add-highlighter window/free number-lines -min-digits 10 -separator ' '
The first 3 lines hide or remove information we don’t want. The last line creates a left margin of 20 blank chars (both -min-digits and -separator string length are limited to 10 bytes). The amount you want depends on your usual terminal window width.
This a far cry from vim’s goyo or similar plugins (which make space on each side of the writing space by creating, then hiding, window splits), but here you go.