Site wide elements in Fred

Say I wanted a footer which should be the same on each page of the website, and I want my client to be able to edit some parts of this using Fred. The changes should be applied site wide. Is this possible?

Similarly, if I want my client to be able to add a script to each page, a Google Analytics tracker code for example, how would I set this up?

Can it be done with ClientConfig perhaps? Would it be possible to get a short explanation of how ClientConfig and Fred could work together? :slight_smile:

Many thanks!