Added prefixes to documentation files

docs/source/write_notes.rst

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+.. _a_notes:
+
+************************
+Supporting Files (Notes)
+************************
+
+novelWriter doesn't have a database and compicated forms to fill in all details about plot elements,
+characters, and all sorts of additional information that isn't a part of the novel text itself.
+Instead, all such information is saved in notes. The relation between all these additional elements
+is extracted from these files by the project indexer based on the tags and references you set.
+
+These files are not required, but making at least minimal files for each such plot element, and add
+a tag to them, makes it possible to use the :guilabel:`Outline` feature to see how each element
+intersects with each section of the novel itself, and add clickable cross-references between
+documents in the editor and viewer.
+
+
+.. _a_notes_tags:
+
+Tags in Notes
+=============
+
+Each new heading in a note file can have a tag associated with it. The format of a tag is
+``@tag: tagname``, where tagname is a unique identifier. Tags can then be referenced in the novel
+files, or cross-referenced in other note files, and will show up in the outline view and in the
+back-reference panel when a document is being viewed.
+
+The syntax highlighter will alert the user that the keyword is correctly used and that the tag is
+allowed, that is, the tag is unique. Duplicate tags should be detected as long as the index is up
+to date. An invalid tag should have a green wiggly line under it, and will not receive the syntax
+colour that valid tags do.
+
+The tag is the only part of these files that the application uses. The rest of the file content is
+there for the writer to use in whatever way they wish. Of course, the content of the files can be
+exported if you want to compile a single document of all your notes, or include them in an outline.
+
+A note file can also reference other note files in the same way novel files do. When the note file
+is opened in the view panel, these become clickable links, making it easier to follow connections in
+the plot. Note files don't show up in the outline view though, so referencing between notes is only
+meaningful if you want to be able to click-navigate between them.
+
+.. tip::
+   If you cross-reference between notes as well, and export your project as an HTML file using the
+   export tool, the cross-references become clickable in the exported document.