Keynote
Add, duplicate, or delete slides in Keynote for iCloud
When you add a new slide to your presentation, you choose from a number of layouts, many of which include placeholder text and placeholder images. Choose the layout that best suits your needs, then replace the placeholder text and images with your own.
You can also duplicate an existing slide (if, for example, you want to reuse many of its elements on a new slide), or delete slides.
Add a slide: Click Add at the bottom of the slide navigator, then choose a layout.
Duplicate a slide: Control-click a slide in the slide navigator, then choose Duplicate.
Delete a slide: Click a slide in the slide navigator to select it, then press Delete.
Note: You can’t copy and paste slides between different presentations in Keynote for iCloud.
Thanks for your feedback.