A method of controlling an application instance using a graphical user interface. In response to the application instance providing a user input control for accepting a command from the user, a corresponding user input control for display in a thumbnail representation of the application instance is generated. When a thumbnail representation of the application instance is displayed, the generated user input control is displayed with the thumbnail representation of the application instance. In response to a user giving a command using the generated user input control, a corresponding command is given to the application instance.