Glo Setting fonts for certain book "news" calibre ePub and calibre questions

I am using a Fetch news source in calibre to send to my kobo daily
This works fine but the fonts are sometimes all over the place as I adjust them for other books etc

Is there a way of configuring a font size for these news source articles

Also with calibre I have shelves
And in my glo hd I have my collections

Is there a way these can sync so I can move books in genres

I can't remember how to create different texts under shelves in calibre at the moment I have two i.e political and biography and I wanted a few more

Another question I had is how can I sync that the calibre library is exactly the same as my glo hd and vice Versa

I want them to replicate each other

I have installed kobo utilities


Many thanks


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