In Mach3 it was very convenient: Click "Edit" make the changes, save. and run again.
Mach4 is a pain: close the file, switch to an editor, find the file, edit, save, switch to Mach4, click on file open, find the file, and finally run again.
I realize that custom buttons can be added but I am surprised that one is missing.
I have searched high and low for keyboard shortcuts but no luck.
There are so many great features in Mach4 that I might be overlooking the obvious.
Bertho