pdf print two pdf pages on one sheet
Print multiple pages per sheet per paper using Acrobat or Reader




  • Choose File > Print.
  • From the Page Scaling pop-up menu, select Multiple Pages Per Sheet.
  • From the Pages Per Sheet pop-up menu, select a value.
  • From the Page Order pop-up menu, select Horizontal, Horizontal Reversed, Vertical, or Vertical Reversed:





    Click OK or Print.



:
https://helpx.adobe.com/acrobat/kb/print-multiple-pages-per-sheet.htm