Headers and footers with a navigation panel are output in the default case. You can already customize the overall formatting and appearance of headers and navigation panels with customization variables (see Customization of Navigation and Headers in Texinfo).
You can specify more precisely the labels and links output in navigation panels with simple code. To explain how navigation panels are customized, we first describe how the document is organized and which directions are available as the directions is the basis for navigation panel customization.