pxart set

set FILE[:frame] KEY x,y [x,y ...] [-o OUT]

usage: pxart set [-h] [-o O] [--dry-run] file key points [points ...]

  set FILE[:frame] KEY x,y [x,y ...] [-o OUT]    paint single pixels ('.' erases)

positional arguments:
  file
  key         a palette key, or '.' to erase
  points

options:
  -h, --help  show this help message and exit
  -o O
  --dry-run   print what the edit says and a diff of the file it would change; write nothing

      Prints "painted N px" ("erased" for '.').

See also, in pxart help all: EDITING (-o OUT gets the whole file, only changed lines are
  rewritten, 'no change'); FORMAT: selecting frames (FILE:SEL, an unnamed grid's name, zsh's
  "${F}:sel").

pxart help all has the whole reference, pxart help TOPIC one part of it.

This is the output of pxart help set. The other editing commands and their shared notes are in pxart help EDITING.