When you have a large number of files you need to work with, it might help to have a way of marking them, for one reason or another. Maybe you've copied a number of photo files from Aunt Emma's CD of vacation pictures and you want to note the ones you like. Or, perhaps you're reviewing student essays and you want to be able to mark the files you've already read.
Mac OS X gives you a way to label a file with color. So, for example, you can highlight your favorite photos from Aunt Emma in green. You could mark the essays you've reviewed with purple.
Here's how you do it. In the Finder, click on a file to select it. Then, at the very bottom of the File menu, choose a Label color for the selected file. There are seven vibrant colors to choose from. If you want to remove the color from a file, click the "x".