User interface basics This section introduces to the foundation of the Genero user interface. The dynamic user interface The dynamic user interface is the base concept of the Genero user interaction components. The abstract user interface tree The abstract user interface tree is the XML representation of the application forms displayed to the end user. Genero user interface modes User interface modes allow you to adapt the application form rendering to different types of displays. GUI front-end connection This section explains runtime to front-end connection in its simplest form. Using a text terminal This section covers topics about text terminal configuration when using the TUI mode (when the FGLGUI environment variable is set to zero).