1. Login to Garanntor Client Area
2. From your home interface, click on Domains in the middle and then select the DNS Manager option in the settings
3. Select the Record type (A, AAA, MX, NS, PTR, CNAME, TXT, SRV, DNAME), Hostname and Value
4. Click "Save Changes" and wait for propagation to complete.
NB: Propagation takes between few minutes to 48 hours to complete.