Greetings to all. I'm a new member in the process of swapping a mach 3 control onto my balding vertical mill. I've used dos-based "ah-ha"cnc on my mill and lathe since the late nineties--its my only cnc experience. I plan to set the mach 3 up beside the ah-ha so I can run either one, so I can get up to speed with mach 3 before making the switch permanent. I have a very busy 1 person shop; most of the parts I make are pretty simple, so I'm in the habit of writing a lot of quick, simple programs manually. For much of the work I do, no cam program could ever be as quick or flexible. The ah-ha system, though crude, has an editor with a graphic display (quite crude but adequate) that tags indigestible lines of code for correction. Is there an equivalent editor for mach 3? Right now it calls up notepad, but it's obviously set up for other editors. Another question--can the mach 3 toolpath display ever show grid lines? I've spent so much of my life seeing them, when they aren't there I get a weird light-headed feeling and think maybe I'm too old for new tricks. I ought to say, I'm a metalworker more than a computer user, self-taught in both.