Header Style (Format) Problem

[Marcel Hungerbühler]

Headers in my spaces doesnt look the same. One Header is underlined and black in one space and in a another space the header isnt underlined and sometimes it has the colour black or blue. As far as i know it is not possible to change the format of the headers in a space with ondemand confluence?

[Nic Brough -Adaptavist-]

See https://confluence.atlassian.com/cloudkb/changing-the-cloud-instance-url-address-or-migrating-to-a-new-cloud-instance-691011835.html