In the print preview mode you currently have to click the arrow up do scroll one page down. This is counter intuitive. It would be more logical to click arrow down to proceed to the next page. Also, the arrows are very small. It would be better if the page up/down keys on the keyboard worked in the page preview mode. So you can scroll pages even without moving the mouse. The space key could also be used to scroll down, a behaviour known from browsers and pdf readers.