To see all (or at least most) printing-related settings in Samba, including the implicitly used ones, try the command outlined below. This command greps for all occurrences of lp, print, spool, driver, ports, and [ in testparm 's output. This provides a convenient overview of the running smbd print configuration. This command does not show individually created printer shares or the spooling paths they may use. Here is the output of my Samba setup, with settings shown in the example above:

root# 

testparm -s -v | egrep "(lp|print|spool|driver|ports|\[)"

 Load smb config files from /etc/samba/smb.conf
 Processing section "[homes]"
 Processing section "[printers]"
 
 [global]
        smb ports = 139 445
        lpq cache time = 10
        load printers = Yes
        printcap name = /etc/printcap
        disable spoolss = No
        enumports command =
        addprinter command = 
        deleteprinter command = 
        show add printer wizard = Yes
        os2 driver map =
        printer admin =
        min print space = 0
        max print jobs = 1000
        printable = No
        printing = bsd
        print command = lpr -r -P'%p' %s
        lpq command = lpq -P'%p'
        lprm command = lprm -P'%p' %j
        lppause command =
        lpresume command =
        printer name =
        use client driver = No

 [homes]

 [printers]
        path = /var/spool/samba
        printable = Yes

You can easily verify which settings were implicitly added by Samba's default behavior. Remember: it may be important in your future dealings with Samba.