A method includes receiving from a client device a request for content, and transmitting to the client device a first content item, a second content item, and a script for displaying the first and second content items within an information resource. The script includes instructions that cause the client device to (1) display the first content item within a content slot having a first size occupying a first region of the information resource, (2) identify a user interaction associated with the first content item, (3) expand, responsive to the user interaction associated with the first content item, the content slot from a first size to a second size, and (4) display, responsive to the user interaction and in the expanded content slot, the first content item and the second content item and an actionable object configured to reduce the content slot from the second size to the first size.