The file download option centered below provides a higher resolution than the preview, it is A4 paper size printable and also contains some additional pages.
On screens with a wider display a draggable magnifier is also available.
The preview window is scrollable, it can be closed by clicking on it in order to return to this menu. A draggable magnifier for focusing on the detail of the page can be toggled by using the button that appears at the bottom right of the screen.
If the interface does not seem functional, please try refreshing the browser cache. It is still somewhat under development and updated regularly.