A method, computer system and computer readable medium regarding an extensible master-slave user interface with distinct interaction models is presented. A slave region is displayed in a Graphical User Interface (GUI), the slave region displaying a current state. A master region is displayed in the GUI, the master region displaying a previous state. When a user selects content in the slave region then the master region is removed from the GUI, a new master region is displayed in the GUI, the new master region containing a view of contents of the slave region, the slave region is removed from the GUI and the content selected by the user is displayed in a new slave region in the GUI.