I scan an image at 150dpi, then print it with paint.net with "Fit picture to frame" on so its as large as it can go. but the printed version is about 2% smaller then the original. Why? I'm trying to make a color photocopy more or less. its not exact. it should be. using the latest paint.net 4.0.13 on Windows 10 with a HP Deskjet 1010 printer.
It does print the proper size in Photoshop CS6.