Ricoh Aficio MP 161SPF - Manual (Page 159)

Authentication Information
151
7
F
Press the {OK} key.
G
Press [Details].
H
Select [Auth. Info] using {U} or {T}, and then press the {OK} key.
I
Select [User Code] using {U} or {T}, and then press the {OK} key.
J
Enter the new user code using the number keys, and then press the {OK}
key.
K
Select [Function Permissions] using {U} or {T}, and then press the {OK} key.