If you have a bunch of PDF files that you would like to print but don't feel like opening them all and pressing the print button, there's a simple way to achieve your goal!
That wasn't so bad, right? Go do something fun with all the time you just saved!
You can take a selective screenshot of anything on your screen by pressing Command+Shift+4. This will change your mouse cursor to a crosshair. Click and drag to designate the region you'd like to take a screenshot of. When you release the mouse button, a screenshot will be saved to your desktop with a name of "Screen Shot <date><time>". You can then rename the screenshot to whatever you'd like. This is particularly useful when trying to copy a picture out of a PDF document or when you only want to capture a small portion of your screen.