Hi there!
Love the map too! We are trying to fix it for our website and have encountered the same problem, I have managed to change the font size of the post title and place as suggested above, but this does not change the font size of the text below, would you be able to change that through CSS as well?
Here is the link to help: https://www.funnelogychannel.com/map/
I have another question on map size, but will start a separate thread on that.
Thank you very much!
Gabriella
