Quick tech tip -
No matter what kind of computer, browser, or operating system you use, PDFs work best with Adobe Reader. It's free, safe, and will give you the best PDF experience possible.
Some computers are automatically set up to use Adobe Preview, which isn't the most user friendly option.
If you don't already have Adobe Reader yet, download it here. I also recommend setting Adobe Reader as your default PDF viewer. You can get easy instructions on how to set that up for PCs here, and instructions for Mac here.