Anyone who has used a Mac for more than a minuscule amount of time has more than likely come across Quick Look, the pop-up window that is invoked with a press of the space bar when a file or folder is highlighted on the desktop or in Finder. Quick Look's usefulness becomes evident when file names aren't descriptive enough by allowing users to view the contents of many different types of files without having to open them in a full-fledged application like Pages for documents or Preview for images.
By default Quick Look can only display a static view of a file that only grants users a peek at the contents without any real function. Imagine, however, being able to copy a document's text without having to open it in TextEdit or Pages. This is incredibly useful in a variety of situations, from dealing with templates to Word documents to code snippets, where having multiple applications and documents opened shouldn't be necessary for copying from one location and pasting to another. The good news is that this functionality is completely possible and perfectly easy to enable.