When viewing a PDF, you'll find the PDF navigation toolbar at the bottom of the viewer area to help you navigate the PDF.
Text Selection Tool - Allows you to highlight text to copy and paste it.
Pan Tool - Allows you to move the document around on the screen. Hold down your left mouse button on the document and move the document.
Zoom Out - moves the PDF view further away
Cancel Zoom - resets any zooming you have done
Zoom In - magnifies the PDF
Screen Fit - sizes the document in line with your screen size
Previous Page - Brings you one page back in your PDF file
Next Page - Brings you one page ahead in your PDF file
Select a Page - Input a page number to reach a specific page directly
Rotate Counter Clockwise/Rotate Clockwise - Use these buttons to rotate the PDF clockwise or counterclockwise.