These are my instructions on configuring my HP 2015n printer to invisibly (to applications) print 2 pages on a single sheet on a single piece of paper.

These instructions might work on different printers as long as they have the feature set in their driver.

Configure the printer defaults

These settings will make the printer scale the full pages and print them 2 a page.

• Goto
  All Control Panel Items --> Devices and Printers 
  or
  All Control Panel Items --> Printers 
• Your HP Printer --> printer preferences --> Finishing --> Pages per Sheet
  • Set to 2
  • This will do what it says, 2 pages onto 1.
  • You can only select one of these options at a time. If you choose one the other settings will be wiped out.

Notes

• Your HP Printer --> printer preferences --> effects--> % of Normal Size
  • This will reduce the print size for each page. The pages will stay separate so this setting does not work.

Create new printer instance (optional)

Setting up a new printer with these options as the default settings will make your lifer easier rather that having to select these options each time you print or reverting the defaults when you are finished.

When I say setup another printer I mean we will use the same physical printer but install another instance of the printer which we can then configure as required.

So follow one of the tutorials below

• Therry - How can I make a copy of a printer in Windows 10?
• How to Install the Same Printer Twice (With Different Settings) on Windows