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Global Settings

I’m new to webflow and have started to implement a site using CMS with collections and items etc

However, there are some dynamic settings I would want to be global that apply to the whole site.
There may be multiple settings, but only one instance of them so a collection will not work.

A simple example, the telephone number is used throughout the site. It would be great if this could be stored and referenced, and then only needs to be maintained in one place?

Is there such a thing in webflow or would I have to use a symbol?