With my inDesign CS6 I have created a document (around 100 pages).
Most of these pages are in A4 format.
Other pages are in A3 format, because their content (graphics, tables, ...).
Now the question:
is it possible to print automatically the document in the different paper size?
Is not so practicable to print 2 times with different format: first, the A4 pages, and in a second time only the A3 pages....
How can my printer to recognize the correct format to print in one time all the document in the correct format ?
You would need a printer driver sophisticated enough that you can tell it to draw certain pages from a different tray. I won't say it's impossible that something exists that can read the page size and do this automatically, I don't believe I've ever seen a system that could, nor am I certain I've ever seen one that is capable of using multiple page sizes in different trays this way. This kind of capability is found on high-end commercial printers, not home or small-office machines, generally.