Challenge 2: A Heading That Only Looks Like One — Solution Walkthrough

Steps:
  1. Select one of the three Heading-1-styled titles from Exercise 1.
  2. Apply the "Normal" style to it (removing its Heading 1 tagging).
  3. Manually select the same text, apply Bold, and manually increase
     its font size to visually match the other two real headings.
  4. Open the Navigation Pane again.

What you see:

Only TWO titles now appear in the Navigation Pane's outline — the two
that still have the real Heading 1 style applied. The third title,
despite looking pixel-for-pixel identical to the other two on the
page (same bold weight, same font size), does not appear in the
Navigation Pane at all, and clicking through the pane's entries
skips straight past it as though it doesn't exist as a heading.

WHY THIS WORKS AS AN ANSWER
------------------------------
The Navigation Pane doesn't inspect how text LOOKS — it reads which
paragraphs are actually tagged with a genuine paragraph style Word
recognises as structural (Heading 1, Heading 2, etc.). Manually
bolding and enlarging text changes only its DIRECT FORMATTING; the
paragraph's underlying style is still "Normal," and Word has no way
to infer "this text is meant to function as a heading" from its
visual appearance alone. Two paragraphs can look completely identical
on screen while being structurally completely different underneath —
one a real heading, one just text dressed up to resemble one.

Notes:
- This is exactly the scenario this chapter's own warning box
  predicts, made concrete: the visual similarity is precisely what
  makes this mistake easy to make and easy to miss, since nothing
  about the document LOOKS wrong until you specifically need a
  feature (the Navigation Pane here, an automatic Table of Contents
  in Chapter 4) that depends on the real structural tagging rather
  than the visual appearance.