page proof 
noun
A printer’s proof of a page to be published.And it will happen in this, because stories look different at every stage along the way, from the manuscript to a galley to a page proof to the printed magazine....
- When at last the copy arrived and he had informed me of how he wanted the pages laid out, I returned a page proof with a number of changes to his text - 64 in total, because he counted them all.
- The 255 page proof of the odd order theorem, filling an entire issue of the Pacific Journal, had set the tone, but it was by far not the longest paper.