Adding new Genre Tabs

[Dalton]

Hi,
I have just started using MB and I want to be able to add an additional tag for Radio Dramas to complement the existing audiobooks, podcasts and music tabs but cannot see how to do it.  I can add items and select to send them to audio books or podcasts and want to be able to do the same for Radio Dramas. Is it possible to do?

Thanks in advance.