More on the theodolite menu

It is a 2-level menu, the entry point after power ON and indexes initialization is at the 2nd level (Theodolite ?), the +/- buttons are used to navigate among several choices, the "enter" button to validate the currently proposed choice. In the above list, "+" will move to the next option (down), "-" to the previous one (up), and "enter" will answer "yes" to the proposition. In some cases (SET A) the choice is just yes/no. Then "enter" means "yes" and "+" or "-" means "no":

1st level menu:

• $--->$M (Measure)?
• A (Adjust)?
• U (Unit)?

2nd level menu M (Measure):

• $--->$ M-0 Return to 1st level?
• M-2 THEODOLITE? $--->$ theodolite
• M-5 Zero angle? $--->$ A=0,Set angle? $--->$ Set A to value
• M-7 Hold angle? $--->$ Hold angle

2nd level menu A (Adjust):

• -$->$ A-0 Return to 1st level?
• A-1 Adjust V index?$--->$Adjust V index
• A-2 Adjust A coll.?-$->$Adjust A coll.
• A-4 Illumin. ON/OFF?-$->$Change Illumin. mode?
• A-5 Compensator ON/OFF?-$->$Change Compens. mode?
• A-6 Levelling with compensation ?-$->$Levelling

2nd level menu U (Unit):

• $--->$ U-0 Return to 1st level?
• U-1 Reverse A reading?$--->$Reverse A reading
• U-2 Change V display?-$->$Select this V display?
• U-3 Change angle unit?-$->$Sel. this angle unit?
• U-7 Sound ON/OFF?-$->$Change Sound mode?
• U-8 Select configuration?-$->$Select this configur?