* The '''buttons''' should always be '''nested inside tabs'''. Otherwise, the configuration is also invalid.
* Captions and icons of buttons are optional. Default values are used for the unspecified ones.
* While configuring the [[Custom Intent Button|custom intent button]], one should always specify one and only one of the target class and the target URI. Otherwise, the button is invalid and an error will be shown.
* The configuration of the ''UBIK-UID'' parameter should always be specified for AR Navigation POI View Button, AR Navigation Maps Button, Demo Maps Button and Target Maps Button.