In this option, you will be able to add custom fonts for your certificates.
To add a custom font click on Add Font.
Now, You should see a popup where you can add The Tite[1] of the front, the Font Name[2], and Select if its an LTL or RTL[3] font now finally click on Browse[4] and select the font file and Click on Add Font[5].
Now, you can delete your fonts by clicking on Action[1] > Delete[2].