To edit the domain zone, You need to use the personal account, go to «Domain», «My domains», «Domain management», «Change DNS in the domain».
Changes to our DNS servers occur within 4 hours after the modification. Due to the distributed architecture of the domain name system, as well as the presence of name caching, changes in all parts of the Internet are not instantaneous, but occur within a few days.
The change of zone for international domains lasts during the 1 working day. You may create a ticket to speed up the process.