Every new Keynote presentation begins with a theme. A theme is a predesigned set of elements—placeholder text and images, fonts, layouts, coordinated colors, and so on—for creating a presentation. Placeholders give you an idea of what a presentation created with this theme might look like when you use its text and object styles.
In the presentation manager, tap Create Presentation, or tap
in the toolbar, then tap Create Presentation.
Tap a theme for your presentation.

Do any of the following to build your presentation:
Tap
to add a new slide.
Double-tap placeholder text to add your own.
Tap
to replace placeholder images with your own.