Keynote 
Add a transition between slides
Transitions are visual effects that play as you move from one slide to the next. For example, the Push transition makes a slide appear to push the previous slide off the screen.
Add a transition between slides
Select a slide in the slide navigator.
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Click the Add an Effect button near the top of the sidebar on the right.
If you don’t see a sidebar, or the sidebar doesn’t have an Add an Effect button, click
in the toolbar.
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Choose a transition.
A preview of the transition plays on the slide.
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Specify transition options, such as duration and direction, using the controls in the sidebar.
If you choose to have a transition start automatically, it begins playing immediately after you advance the slide.
To remove the slide transition, click Change in the sidebar, then choose None.
Tip: If you want to apply the same transition to multiple slides, apply the transition to a slide, then duplicate that slide multiple times. When you add content to the duplicated slides, the transition is already in place.