When you want to choose specific fonts for your web chatbox
In the Server admin area visit Site Configs/Set of Google Fonts:
This is the hyperlink: https://fonts.google.com/?selection.family=Montserrat|Open+Sans|PT+Serif|Playfair+Display|Poppins|Raleway|Roboto
Pick the font you want to use:
After adding your fonts, they should appear in your selected list;
Copy what is highlighted and insert in "Set of google fonts" -->> Or leave it empty to use the default fonts.