One of the things about the iMac, in fact any Apple-made display, is it’s extremely high quality image and colour-depth. It’s not that you’ll necessarily notice it immediately, but if you ever move back to a PC monitor, you’ll become acutely aware of the difference in quality.
Given that the iMac has a superb display, it could be useful to share that with another Mac, on occasion. In this tutorial I will explain a little known feature, named Target Display Mode, and show you how to use it.