Smart Key
Smart Key 
provides a quick shortcut to Lenovo apps and service. Press Smart Key to open the launch panel.
There is also a trick to Smart Key. Go to Preference on the launch panel, select ADD and choose your favorite app to associate with Smart Key. When it is done, press Smart Key twice in quick succession and your favorite app is opened.
You may need to connect to the Internet and complete Windows Update for this feature to take effect.
