indesign how to print 2 A5 to A4 on a

1.If the set when production began, “on page”, it is very simple:the “Print” dialog box “page” option in the “cross-page” is selected, and then adjust the page number and page range direction on it; 2.If it is a single page or two files, it would only be able to copy them to an A4 page to print.hope you can help!