Challenge 2: A Manually-Overridden Title Surviving a Master Change — Solution Walkthrough

Steps:
  1. On one specific slide, in Normal view, select its title text and
     manually change its colour directly (not via Slide Master view).
  2. View > Slide Master, select the top Master slide, and change the
     title colour again to a different colour than before.
  3. Return to Normal view and compare every slide's title.

What happens:

Every slide EXCEPT the one manually edited in step 1 now shows the
new Master colour from step 2. The one slide that had its title
manually recoloured keeps the colour that was directly applied to
it in step 1, completely unaffected by the Master change in step 2.

Why:

Direct formatting applied straight to a specific slide's own
placeholder always takes precedence over whatever the Master or
Layout would otherwise supply — the moment that title's colour was
set manually, that one property became disconnected from the shared
Master definition for that specific slide. The Master can still be
edited freely afterward, and every OTHER slide (which never had its
title manually touched) keeps reading its colour live from the
Master, but the one overridden slide has its own independent,
frozen value for that one property from that point forward.

WHY THIS WORKS AS AN ANSWER
------------------------------
This is the PowerPoint-side demonstration of exactly the same trap
Chapter 2 described for Word: a paragraph that had Heading 1's colour
manually overridden with direct formatting would similarly stop
reflecting later changes to the Heading 1 style itself. Direct
formatting overriding a shared definition, and then silently missing
out on later updates to that definition, is the same underlying
mechanism in both apps — just applied to a slide's title placeholder
here instead of a paragraph's style.