Ricoh Aficio MP 161F - Page 157

Authentication Information
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L Select the function you want to set the user code for using {V}, and then
press the {OK} key.
M Press the {Escape} key.
N Press [End].
O Press the {OK} key.
P Press the {User Tools/Counter} key.
Note
❒ You can enter a one-to eight-digit user code.
❒ For registration of a name, see "Registering Names".
Reference
p.140 “Registering Names”