Sharing screens lets you share your computer screen with anyone on Skype. For example, you can display presentations, show friends photos without having to send them, or show someone how something works on your computer.
                    Sharing your screen with one other person is free and available 
                      on Skype 2.8 for Mac OS X and above. You can also share 
                      your screen with multiple people during a group 
                      video call, but at least one of the people on the 
                      call must have Skype Premium, 
                      and all should use the latest 
                      version of Skype.
To start sharing your screen:
    - Sign in to Skype.
- Find the person or group conversation you want to share your screen with.
 Learn more about finding contacts or 
                        conversations.
- Click the share icon   in the upper right of the conversation window and select 
                        Share Screen… in the upper right of the conversation window and select 
                        Share Screen…
 You can do this before or during a voice 
                        call or video 
                        call.
 
  
 
- Choose which screen you would like to share, or if you’re only using one screen, click Start.  
- When you want to stop sharing your screen, click the share icon again and select Stop Screen Sharing.
You can switch presenters at any time and as often as you 
                      like and share screens across platforms (Windows, Mac and 
                      Linux). The person you are sharing your screen with can 
                      send you video at the same time, and you can also talk to 
                      each other, send instant messages and send 
                      files.