mach 3 table home

[Jubera Fab]

Hi, I am new to mach 3. I have my table set up and am trying to do a dry run. I can not figure out how to set the table up, it is 4 feet by 8 feet. When I load the g code it isn't even on the table. I am completely lost. Any help would be great.
Thanks

[Jubera Fab]

Anyone?

[DJNPHOTO]

i put mine in the center of the table all the time