If several copies are required and the check box Assembled copies is selected, the pages are assembled before the copy is printed. Otherwise, each page is repeated.
For instance, for the printing of two copies of three pages :
if this box is selected, the page order will be 1, 2, 3, 1, 2, 3.
if this box is not selected, the page order will be 1, 1, 2, 2, 3, 3.