Functionality is implemented to determine that a first content presented by a first graphical user interface container is related to a second content presented by a second graphical user interface container. The first graphical user interface container and the second graphical user interface container are merged to generate a merged container that presents a merged content. The merged content comprises a first constituent content of the merged container that corresponds to the first content and a second constituent content of the merged container that corresponds to the second content. It is determined that a first action associated with the first constituent content can operate upon the second constituent content. The first action operates on the first constituent content when invoked. Computer program code that implements the first action is reconfigured to operate upon the first and the second constituent content of the merged container.