You're welcome to make changes and distribute those via contrib. To get your own directory under /n/sources/contrib, mail cont...@plan9.bell-labs.com.
You might also be interested in reading [0]. If you insist on using arrow keys to get from one line to another you could also simply use the left/right arrows, although it might take a bit longer to reach your destination. Using the mouse is definitely faster. Keep in mind the Plan 9 way of doing things; the mouse is used to *control* stuff and the keyboard mainly for *text input*. Best regards, F. Caulier [0] http://plan9.bell-labs.com/wiki/plan9/how_to_contribute/index.html