Patterns of domains in the DNS are useful if you have a larger number of domains that have the same DNS records. Then you do not have to add each domain DNS records manually, but you just can create the pattern and then use it when you add a new domain to DNS.
Management of DNS patterns is performed in the customer center, on tab DNS, in the left menu use link Patterns.
Each pattern can be named for better clarity.
Part of the pattern is also outgoing AXFR settings (enable / disable a list of permitted IP addresses).
In pattern can be edited DNS records the same as for real domain. In addition to the value of the record, which is expected domain name, you can specify a placeholder (domain), that will be replaced by domain name after using pattern.
An example of a pattern:
webmail CNAME mail.(domain)
will be after adding of domain example.com with using of pattern substituted like this:
webmail CNAME mail.example.com
In form to adding or mutiply adding of domains to DNS you can find a menu with prepared patterns, there you can choose and use pattern.
The pattern can be used when you adding domains in DNS only, it can not be used for an existing(in DNS) domain – in this case, delete a domain from the DNS and add again.