How to...

preview the publication:

click on the arrows at the side of the pages

switch to reading mode:

click anywhere on the publication to go to full screen mode so you can read the publication.

zoom:

use the mouse scroll wheel
or
use the slider bar at the top


flip between pages:

click on the arrows at the sides
or
use the page controls at the top
or
click on one of the preview images at the bottom


exit full screen mode:

hit the ESC key on your keyboard
or
click on the X at the top