(1) Drag a page with your left mouse button
(2) for fast flipping just click a page corner
(3) flip fast by using the center buttons on the navigation bar or with the left and right arrow key of your keyboard.
Zoom function:
Click the magnifying glass symbol to enhance a page. Another click changes back to standard view.
PDF-Download:
Click the PDF symbol to download the current left or right page.
Print:
Click the print symbol to print the current left or right page.
Top of page 
Print page