If your printer is configured with CUPS, the best option is to use the printing method CUPS.
Then use the Print papers button, choose the right printer, and the stapling options should appear when you open the printing options block.

Hi there, Alexis.

Thanks for your prompt reply and I'm sorry for my very late answer. I just had other issues with my own exams here (due to different AMC versions) and I was unable to print from the AMC interface itself.

Now I fixed that issue (thanks for this community!), and tried to print another exam, but there was no Stapling option (even selecting CUPS), despite it appears on the print dialog of other software (web browser, PDF viewers etc.). I think it is some configuration on the printer (shared over the network at my institute). I dig into that PPD files, found something that seems related to stapling, but I got stuck at it. Just in case, if anyone knows, is there a chance of changing anything in this file (at my machine - /etc/cups/ppd), so the option for stapling appears on the AMC's Papers Print dialog? (I may attach the file here if it helps).

Best, Alexandre

If you found something related to stapling in your PPD file, maybe the option name used there is not known to AMC.
AMC looks at the printer options, and shows in the printing dialog those that belong to a list of "useful options", which is

Staple Stapling StapleLocation StapleSet StapleOption

If the option in your PPD file is not named accordingly, you can add it in Preferences/Main/Printing/Useful printing options, so that AMC will add it to the printing dialog once you selected the printer.

You can also get the printer option names with

lpoptions -p PrinterName -l

or

lpoptions -l

for the default printer.
With mine:

...
HolePunch/Hole Punch: *None LEP-0R SEP-0R LEP-180R SEP-180R
Stapling/Stapling: None *UL ML LL UR MR LR MT MB SS
Folding/Folding: *False True
...

Forwarded from Alexandre :

Dear Alexis,

Sorry for the late delay, but your instructions were successful here!
Thank you very much. Just for the record, one has to use the labels without space in their names provided by the lpoptions command. Here are the options for HP LaserJet Flow E82660:

HPOption_HPStaplerOptions/Stapling Unit: *None HP1StapleUnit HP2StapleUnit
HPStaplerOptions/Staple: *None 1Staple 1StapleLeft 1StapleRight 2StaplesLeft 2StaplesRight 2StaplesTop 2StaplesLeftOrTop FoldStitch

HPOption_HPStaplerOptions HPStaplerOptions

Best, Alexandre