Step 1: Login to the cPanel account.
Step 2: Select 'Zone Editor ' option unde 'Domains' section.
Step 3: Select the addon domain and click 'Manage' option followed by the domain.
Step 4: Click 'Add record' option and enter the values and click 'Add record' to complete the process.
Step 5: In the same way, you can edit the existing records to click 'Edit' option followed by the record.
Step 6: Click 'Save Record' to apply the changes.