On display units, it is often necessary to adapt the function keys to the respective application. On Windows-based systems, pressing F1 key usually opens context-sensitive help, behavior that is not always desired for HMI applications at runtime. B&R Automation Panel devices have an easy-to-operate key editor program. The functionality of each key can be configured separately. Each key can have up to four functions. It is even possible to send multiple characters with a single keystroke.