Many modern computer monitors have such a high resolution that things like icons and text are getting too small to read without reducing the overall resolution. And what’s the point of having a high-resolution monitor if you can’t use it at its maximum resolution? The situation is further complicated by the fact that today’s LCD monitors have a native resolution at which they look the best, and if you lower the resolution to make things larger, you may degrade the quality of what you see. Microsoft is aware of this issue and has created the DPI Scaling tool to fix it. The tool allows you to tell Windows to increase the size of text and graphical elements. The linked article explains it in more detail and gives instructions on how to use it under Windows 7, but DPI scaling is available as far back as Windows XP (it’s part of the advanced display settings).