Samyung NAVIS 5100 Instruction Manual page 108

 How to shift Line & Homing magnification screen
Press ( ) to shift Line & Homing magnification screen in order
 Line magnification range set up
) 
) (Press to change the range 『2.5m/5m/10m/20m/40m/80m』 in order)
( (
( ) (Press to change the range in the opposite order as above)
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