As soon as I’m getting closer to the right hand margin I know which words I will put down next and I know how wide every letter is that I write, then I adjust t

As soon as I’m getting closer to the right hand margin I know which words I will put down next and I know how wide every letter is that I write, then I adjust the words and the spaces such that I end on a word border or syllable border. If it’s a word border it’s already justified, if it’s a syllable border I hyphenate. My hyphens and punctuation marks I leave purposely outside of my justification margin, I like that presentation. I can do it with text widths as wide or narrow I want. Sometimes I just know what the layout is going to look like and adjust my margins and spaces accordingly, kind of like in a LaTeX document.