I want to add "Zurich BT" Font in email editor as displayed in below screen shot. I tried to follow steps mentioned in Microsoft's documentation (https://docs.microsoft.com/en-us/dynamics365/customer-service/customer-service-hub-user-guide-email-font-admin ), but this didn't work for me.

As per instruction I modified RTE editor .JS file and added font name, but still it is not reflecting in dropdown. 

Can someone help me out here if I'm going wrong somewhere, or is there any alternative way to achieve this?