I am only guessing, but assume you want the ribs machined into the surface of the plate and then in the square part on the air cleaner you will put some text.
Adjust the spacing of the ribs to suite the tool you will use and the look you want to machine into the plate. For example; The current path spacing is about .030".
Create a pocket such that the pathing would be spaced bigger and actualy use a smaller tool adjusting the depth to suite what affect you want. You will need to lay it out some before hand.
Once you have the pathing you can assign cut parameters as you want.
But as i so state in the manual, you figure out what you want to machine before hand and don't try to use LC as a CAD program.
RICH