It is according to what software version you have as to where you change from inch to metric.
put your cursor on the upper left corner of the screen. Press 8, press enter, move the cursor to the upper right corner of the screen where inch or metric is displayed. Press the INC DATA key on the keypad. See if your display flip flops to the opposite measurement system.
Good to know that GFMS still supports Mondos.
Can you help me please with the manual ?
I know it is not free.
Also, the machine didn't came with the hand control(handbox). I maybe can make one if it only receive ON/OFF signals. If you have the electrical schematics will be great.