hi guys
is it posible in mach 3 to make 2 buttons z+ z- to jog but i need these two buttons work while the g code is running

Yes it is possible I do it all the time on my flame torch If I understand right you want to fine tune the z Axis while running g code

ok good
but can you tell me how

No I will help anyway I can Go to config ports and pins input signals  in input signals stroll the to  THC UP and THC down  enable both enable Emulated then set a hotkey for up and down this will control your up and down with the keyboard hit apply and go to Mill Options check mark Allow THC UP/DOWN Control even if not in THC mode hit apply and OK your ready to go

Also do a search of ( Jogging Z axis while machine is cutting ) that will help you on this forum

OK i allready did that but the problem is that while it is moving the z axis it does not remember the correction so then you have to correct again when you have the next z axis move for example lets say i have a cutting height of 5mm and i make a correction of a 1mm down so the z dro is reading 4mm after when you have the next g code that say g0 z5 it will go to z5 and not z4mm so the correction must be in the offset then

Well that is all I can help that is how I us it I like to fine tune on ever z plung

how about edit the gcode? Find and replace?