Appearance
CKeditor
Wyvern is powered by CKeditor 4.x.x. Also Wyvern will try to ship the latests release on every release of the module.
There are a lot of modules that are used with CKeditor and I will not document this here (of course 😉) To find the right documentation you can navigate to this page where you can find all modules that are used inside the CKeditor