Hi,
I have been working with Vaadin for several weeks and I am still confused with all the Layout paraphernalia (setSizeFull, setUndefinedSize, setExpandRatio, setWidth, etc)
Could somebody explain me how to expand a MenuBar to whole screen width?
just call setWidth(“100%”); to the menu bar. Of course this assuming that the layout containing the menu bar has also been set to 100% width, which seems to be the (intended) case judging by your screen cap.