1. Login to Garanntor Client Area
2. From your home interface, click on Domains then click on the settings icon infront of the appropriate domain and then click on DNS Management
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.