I'm not sure if I understand what you need to do, but if you install the Postscrip driver you will find on it an option to print 2UP. Both A3 pages will be printed on a A4 page.
If you wan't to print A3 on a A4 then you can easily set it from Acrobat reader. At the print windows, make sure that the printer driver is set to A4, then in the adobe print properties chose the Fit option. You should see the resoult in the preview.
No sure if this what you want. Sorry.
Be sure to give out Kudos and select "Accept as Solution"
We have just purchased two brand new Xerox 7545 copiers. I want to print an A3 pdf (multi side) on A4...basically just half the paper size. I don't understant how 2? I just don't get it right so any tips are welcomed.
I tried setting paper size to 50% under tha advanced folder in the settings...but no...