Hi Paul,
Thanks for posting your question regarding the options to change the font for your website. I’m sorry to see that you are experiencing an issue. Although I’m not quite sure what the issue you are describing, I was unable to replicate any issues with my test BoldGrid website when changing the fonts for the Monument – Photography Inspiration.
When you navigate to the Fonts section of the Customizer, what options are available for you to click on? It should appear as a list of common elements (Menus, Headings, Subheadings, Main Text) on the page that you can click to customize the typography.
Best Regards,
Carlos D