Word 2013: If I add a template to a document then update the template

[chrisdukes]

...will the document update automatically?

 

[Ranger4]

Do you mean if you created a new document from a template. Your very brief question is not very clear.

If you created a new document from a stored template then altering the template will not alter the document.

A template is a stored base design that you have stored for future use, so that it can be used to create a new document with the same format. Once that new document has been created & saved it is no longer connected to the template.