Add a Banner to a Notebook
Put a fixed banner cell at the top of a notebook.
In the Current Notebook...
Add a banner to the top of the current notebook by setting the DockedCells option:
Set the DockedCells option to add a banner to the current notebook. Scroll past the top of the notebook (iOS) or press the Refresh button (Android) to refresh, making the banner visible:
The value of DockedCells requires low-level representations of typeset cells, typically constructed using Cell, BoxData, TextData and ToBoxes: