Abstract: A method includes providing, for presentation on a screen of a client device, a user interface associated with a first session of an application, the user interface associated with the first session of the application comprising a plurality of content items; receiving, via the user interface associated with the first session of the application, a user selection of a first content item of the plurality of content items; providing, for presentation within the user interface associated with the first session of the application, a sub-window for the first content item while keeping at least a portion of the user interface associated with the first session of the application visible on the screen of the client device; receiving user input indicating a request to initiate a second session of the application; and in response to receiving the user input, causing a user interface associated with the second session of the application to be presented together with the sub-window for the first content item.