Im just wondering if there is a way in Mach 3 to turn the THC off completely and manually controlling the "Z" with my "page up/down" buttons like I can before the G-code takes over!?!

I'm using thin sheet metal that is pretty warped and just want to control it on my own!

Also when I run my G-code the Z coordinates go way outside the settings...like automatically wants to go 20+" up before it stars a cut and I have all my settings withing 1"!?!