indication is received from a plurality of persons and the decision of user preferences to be used is done then based on the received indications application_number US 201715444845 A description reference will now be made in detail to the embodiments of the present invention examples of which are illustrated in the accompanying drawings in fig1 a block diagram of an embodiment of the present invention in the embodiment a language selection is used as an example however other user preferences are applied correspondingly furthermore it is possible to receive indication or indications for a plurality of user preferences that may be applied if it is possible in the embodiment a public display 11 is located in an elevator car 10 the public display 11 may be related to controlling of the movements of the elevator car 10 or it may be a separate system displaying important information entertainment advertisements or any kind of information what could be of interest passengers travelling using the elevator car 10 have a mobile device 13 which is communicating with the public display by using a wireless communication method 14 the wireless communication method is typically bluetooth wifi or similar local communication method which can communicate over a small distance without a need of close contact comparable to an introduction of key card the network connectivity means may be incorporated with the public display or there may be a separate transceiver coupled to the controller controlling the display the public display may include controller for.