What do these edit boxes do?
All these boxes are for putting anything you want in them. Most of the names are self explanatory. The extra ones are for whatever suits you. Actually all of them can be for anything you want
And, if you edit a template properties you can assign your own names to the "extra" fields. Extra1 could be "birthday.". Then, when an article uses that template, you'll see the field named "birthday" in the extras tab.
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