A few years ago… well, 40+ years ago, music that I arranged and composed was done by hand. I always used a ruler to make it as readable and as an attempt to remove confusion in order to save time in rehearsal. It was tedious, but it made rehearsing more efficient and more fun. Here are three examples out of MANY that I did until the early 1990s when I started using a software program called Encore on my home PC for composing and arranging. What a pain that was, but it made a decent and readable copy.
I learned much about myself and others. Of course, I learned about being a music copyist and rehearsing groups of people. If our “modern” computer technology ever ceases, I know that I can still put my thoughts on paper.