Position the part and cutter where you want, then in the MDI line
G01 X 8.0" F1.0
G01 -thats a linear interpolation move, X8.0 - the X axis will move 8.0 units, F1.0 - at a feed rate of 1.0 ipm.
You change the axis, the travel distance and feedrate to suite what your doing.
RICH