Edit Mode is a feature to preview the student view of your class using the Edit Mode switch on the top right. 

The Edit Mode switch ON means that you are in the edit mode and can see all editing options.  The Edit Mode switch OFF means you are in the student view. 

Edit Mode On:

Edit Mode Off:

 

NOTE: The Control Panel will stay visible to instructors, but students never see this option in their view.

Video Demonstration: