If I have two buffers open, side-by-side, how can I move from the right
buffer to the left buffer via the keyboard please?

Thanks
Sharon.
-- 
A taste of linux = http://www.sharons.org.uk
TGmeds = http://www.tgmeds.org.uk
Debian 8.6, fluxbox 1.3.5-2, emacs 25.1.1.1