Apply a master slide in Keynote on iPad
To quickly change the look of a slide, you can apply a different master slide to it. If you make changes to a slide’s format and later want to use the original formatting of its master slide, you can reapply the master slide. Reapplying the master slide won’t delete your content.
Apply a different master to a slide
If you don’t see the slide navigator, pinch closed on the slide to zoom out.
Tap , then tap Master.
If you don’t see Master, make sure nothing is selected on the slide.
Swipe to see all of the masters, then tap one to apply it.
Tap the slide to close the controls.
Reapply a master to a slide
You can reapply a master to a slide so that text and media placeholders return to their default style and position, the slide background returns to its default color or image, and placeholder objects are shown or hidden as they were by default.
Note: If you’re sharing a presentation with others, you can’t reapply master slides.