As daveteu says above, if you followed the set up instructions all these should be enabled automatically. Look at the first admin page on your box to see what might still need to be done.
This is assuming you are using MIAB as the DNS. If you need to set up these records on a different DNS (at you domain registrar for example) then see the ‘External DNS’ page on your box. There you will find the settings you need to copy across – record type and the text string you will need to copy.