Since Auto reduce/enlarge only works on standard paper sizes you need to specify what the size of the pages are in the book or nobody can help. But the answer is just going to be to set the original size to the page size and make the copies with the right amount of reduce/enlarge to get the size correct, and it won't be perfect in most cases since reduce enlarge is not done on the X and Y axis independently. So if the books aspect ratios is not the same as the output stocks folded aspect ratio, it will have odd margins.
I am trying to copy a book that is larger than standard 8 1/2 x 11. I want to reduce it to fit on 8 1/2 x 11. I have tried several different settings and options but it is not working. I have also tried just reducing it as an indivual copy but it keeps changing the direction of the output. I would really like to be able to do it as a book copy since there are a large number of pages. I have the WorkCentre 5890. Any help would be great TIA.