I have made a layout using eagle then save it as PDF to print a test paper before routing. I didn't design any package its all eagle's packages. I exported PDF as shown on the image but the problem is : the atmega16 and l293d and even ne555 packages are all scaled down on the printed paper ! as you can see on the other image i put the real component aligned with the printed paper but they didn't match ?!
What did i do wrong ?