Edu X themes integrates following font icons which you can use on your website.
- FontAwesome 4 font icons
- FontAwesome 5 font icons
How To Enable Font Icons
By default, all font icons are disabled. You can enable them from theme settings
Navigate To:
Home 
Administration Appearance Appearance settings Edu X Components Font Icons
example.com/admin/appearance/settings/edux
Here you can enable individual font icons.
