Is this a setting in a different peice of software like LazyCam or something?
Yes.
I am not familiar with LazyCam, so I can't tell you the steps to achieve a tool path.
have done other milling using the back and forth X Y method over the whole peice of material.
I am now assuming that you don't have a CAM program and used something like "picture to G-code" or something similar. Is this correct? If you DO have a CAM program, tell us what it is, and somebody with the proper experience can help you better.