Saving our files with printing marks - make sure all artboards are the right size - file --> save as.
research - 6 pages - technique 1 - up to 12 - tcnique 2 - up to 12 - save as pdf. If there are extras you don't want, make sure to delete them before you save
press quality - marks and bleeds - select all printer marks. use document bleed settings. Then hit create.
At the end, we combine all the pdfs into adobe acrobat pro - file --> create --> combine files into a single pdf.