Ok, thanks for all the replies.
I did take a look at Mach2 screen designer but right now I'm not at my machine. I'm assuming that screen designer is included with my Mach3 software purchase. I'll be looking for it when I'm back at the machine. After looking at the screen designer doc's, I'm even more impressed with the functionality and value a person gets with this purchase. I'm thrilled.
Also, what is "screen4"? You mean the fourth tab over in Mach3? I've played only a small amount with the hot key setting screen but from what I saw, there's limited hot key assignable topics.
Sorry, for my ignorance, I can see I have a lot to learn.
Thanks
LEW