Technologies are described herein for a user interface uniting two primary components, a list view and a reading pane, within a message reading application. Technologies are also described for synchronizing status and parameters between the two primary user interface components. In particular, a user interface for reading messages can represent all components of a conversation with both a list view for presenting a message map, and a reading pane for presenting a content view. The list view can present a list of messages grouped by conversation. The reading pane window can contain smaller windows or frames. Each of the smaller windows or frames can contain a message within a given conversation. Synchronization provided between the list view and a reading pane can allow message selection in one of the user interface components to cause display and selection of the corresponding message in the other user interface component.