what is the first part of the document called?
It can be called embedding. Depending on how it is done, it can also be called linking if it is done in such a way that if the chart in the Excel document changes, so will the one in the Word document.
the title bar
These are called "hyperlinks". A hyperlink is a reference or navigation element in a document to another section of the same document or to another document that may be on or part of a (different) domain.
Document is a noun (a document) and a verb (to document).
The addition to a document is commonly referred to as an "addendum." An addendum is used to include supplementary information, updates, or modifications that were not part of the original document. It helps clarify, expand, or correct the content without needing to rewrite the entire document.
A document can also be called a paper, a text file or simply a written document.
A saved document is called a "file".
If you're referring to Microsoft Office: Word, the area is called the "Document".
A template
uhm, im not entirely sure. but i think it may be the preamble. :) check it out.
A saved document is called a "file".