Methods and apparatus, including computer program products, implement techniques for rendering application user interfaces. Application data is displayed in user interface elements including two or more independent elements and one or more dependent elements. One of the independent elements can have the property of being the selected element and the application data displayed in the dependent elements is made to correspond to the application data displayed in the selected element. User input is received from a user to establish a normal mode or a decoupled mode of user interface operation. Navigation input is received to navigate from one user interface element to another user interface element. In the normal mode, navigation to an independent element causes the independent element to become the selected element. In the decoupled mode, navigation to an independent element does not change which, if any, of the independent elements is the selected element.