
   Step by step
  ==============

  
  .mk -> mark the top of the page
  .po -> set the left margin (┌)
  .ll -> set the line lenght (┐)
  .ch -> set a trap at the bottom (──)
  
         ┌                       ┐
          hello world hello world
          hello world hello world
          hello world hello world
         ─────────────────────────────────────── ─ ─ ─
  
  .rt -> return to the mark: top of the column
  .po -> update the left margin
  
  
