The slide master is a template every slide inherits from: the font, the colours, the logo and the positions of the titles. Edit it once and the whole deck changes in the same instant.
1 One edit… a whole deck
A slide whose text was added in a manual text box inherits nothing — which is why one slide stays in the old style after every edit. Use the placeholders the layout provides.
2 Three layers not to confuse
| Layer | What it is | Changing it affects |
|---|---|---|
| Theme | The package of colours, fonts and effects | The whole deck and any new slide |
| Slide Master | The top-level structure the layouts inherit from | Every layout beneath it |
| Layout | A slide type: title · content · comparison · section break | Only slides built on that layout |
Build your five layouts once
Most professional decks need no more than: cover · section break · content · big number · chart. Create them in the slide master and save the file as a .potx template — then build every future deck on it.
3 Theme colours, not free colours
When you pick a colour from Theme Colors rather than “Standard Colors”, it changes automatically if the corporate identity is updated, and the deck stays consistent. Free colours remain isolated islands that give themselves away after the first update.
A theme
Two core colours, not seven
One typeface
In different weights
Layouts
Five are enough
A .potx template
Reused every time
Consistency
It reads as institutional work
Consistency alone raises the impression of professionalism before a word is read
The font that is not on the room’s machine
If you design with a font that is not installed on the machine you will present from, PowerPoint substitutes another and the layout collapses in front of the audience. Either embed the fonts in the file from the save options, or stick to a common font — which is safer.
Lesson summary
- The slide master controls the whole deck from one place.
- Theme → master → layout: three ordered layers.
- Use placeholders, not manual text boxes.
- Choose theme colours so they change with the identity.
- Save your .potx template and embed the fonts, or stick to common ones.
4 Test your understanding
Three quick questions
Pick the answer you believe is correct and you will see the result immediately.
1. You edited the slide master and everything changed except one slide. The cause:
Placeholders are what inherit from the layout; a manual text box is entirely independent.
2. You will present from the room’s machine, not your own. The biggest risk:
Embed the fonts when saving, design with a common font, or carry a PDF backup.
3. You will be producing recurring monthly decks. The best approach:
Copying the old file carries over leftover slides and broken styles; a template starts clean and consistent.