Hi Attar Dasthagir,
Need to call the material icon name on the page where you want to Implement.
Example: If you want an info icon to be present on the page. You have to call the icon name from https://fonts.google.com/icons and then call the class name which you created in the source file.
Hi Attar,
a better way to implement this is to follow the blog which Jason has already written about this !
https://medium.com/mendix/mendix-how-to-add-font-icons-465e2a03884