general question about styles in 7.1

I'm wondering how to find what style a section is in 7.1. You used to be able to hover over and then make customizations but now in 7.1 that doesn't appear to work.  I'm trying to use custom fonts. I've uploaded the fonts and named them in the custom CSS section, but there are still some areas that have the old/default fonts b/c I don't know how to refer to them in the custom CSS. 

You can share link to page where you want to change to custom font & let me know which element, we can give you ID for these elements