Android Question B4XPages with cross-page navigation

Having been convinced by Erel to move to B4Xpages I am trying to port my current project to pages,
BUT I don't know how to implement my (simple) navigation buttons:

My app uses 5+5 pages and navigation buttons as on the left side of the enclosed picture. Clicking on the first one opens a second navigation bar above (right side) for the additional list pages. Thus all pages are always quickly accessible from anywhere.

How can I show these 2 navigation panels on every page while still showing the rest of the page and without duplicating the full btnPage_Click Sub? Today they are part of the main page and the activity height of the other pages is reduced. Is this also possible under pages or would a separate class do the trick, if so how?

Thanks for your help.

Brest, john m.