I’ve added some fonts to Blocs, but I can’t find a way to change the font globally either by page or through the whole site.
Look under “FILE” >>> “Project Settings” >>>>>> Click on the “T” for text.
Change it there.
Rich the Weather Guy
Thanks for the tip.
Happy to help! 
You will also find the first class (well collection of classes). It’s the first item anyway in the class manger covers most things. You can set a font type here too.