Navigate to : Merchandise > Font Family > Embroidery Font Set > Click on Embroidery Font Name

Steps to Edit a Embroidery Font Set 

1. Hover on Merchandise, from the top menu bar in admin.
   
2. Choose Font Family submenu under Merchandise Menu.
3. Click on Embroidery Font Set on left navigation.
4. A list of font sets will appear. Click on the font set name/link to edit.
   
5. Below screen will appear.
   
6. Update the details and assign or unassigned the fonts as per the requirement and click on the save button.
7. After saving a message will be displayed as shown below.