Click DNS option on top and scroll down to see the dns options (see the screenshot below)
Points to note
LIST RECORDS will list the current dns entries. You can select those entries to edit or delete as per needs
ADD new records to the dns zone
Above example will add test.jpwebsite.com pointing to IP 192.3.198.2
EDIT DNS (use this option if you need to update an existing record. You can update IP, SOA, TTL etc)