There are a half dozen reasons why one of my files may not have line numbers. Generally, I prefer the app to display the numbers if possible, putting numbers in the file makes the Gcode 10-20% larger, and really messes up hand editing (cut and paste especially).
My offline editor displays line numbers, and so does Mach4's built in editor. The display window can as well - I just want to know if there is a way to make that window default to displaying the line numbers please.