A television display system with a television display for displaying television services and internet information, and an input unit for providing a command, the television display system receiving a data stream containing a plurality of key files, each key file including executable data and a respective key image representing said executable data. The television display system includes a memory for continuously maintaining over a period at least one of the key files, a display section displaying upon occurrence of any of a number of preselected events, a key image stored in said memory, superposed on a displayed said television service, said key image upon activation executing said executable data included in the same key file. The system also includes a command section for executing content of the key file of the displayed respective image conditional upon a key command being provided by the input unit.