HP 815MFP - Manual (Page 95)

hp designjet 815mfp & scanner 4200 89
tell me about lists
creating and printing lists
You can select single or multiple files for printing by putting one file
or many files in your list. Multiple selections enable you to use
business hours to create files for copying and then let the program
print your copies overnight. You can set the number of copies you
want by defining the number for each file individually, by
determining the number of sets (how many times the whole list will
be printed), or by using a combination of both.