Have you ever wanted to show someone exactly what you are looking at on the computer, but the person isn't with you at the time? With Lync 2013 you can share your screen - or just part of it - with other people, like colleagues. To do this:
Open a Chat window with the person(s) with whom you want to share your screen.
Hover your mouse over the monitor icon on the bottom of the chat window.
You may choose to share a specific program, a specific monitor, or your entire screen (nothing on your screen is shared until you make your selection).
NOTE: This is not available in the Windows 8 Lync Metro App