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Preset: Use this key to access the preset menu. The preset menu allows you to preset all of the instrument parameters to factory defaults. Esc: Use this key to escape a function setup or parameter entry that has been initiated, but is not desired. 0,1,2...9: Use these keys for entering numerical values. +/-: Use this key for changing a value’s numerical sign. .: Use this key for entering a decimal point. Back Space: Use this key for clearing an active entry. Enter: Use this key for entering the