A reception apparatus includes a receiver and processing circuitry. The receiver circuitry configured to receive a broadcast stream that includes television content. The processing circuitry executes a television receiver application that displays the television content. The processing circuitry receives indication of a selection of a key that is provided on an input device. In response to reception of the indication of the selection of the key, the processing circuitry determines whether a broadcaster application has reserved the selected key. In response to the determination that the broadcaster application has reserved the selected key, the processing circuitry determines whether a native application associated with the broadcaster application has reserved the selected key. The processing circuitry processes, by the native application, the selected key in response to the determination that the broadcaster application has reserved the selected key and the native application has reserved the selected key.