Click Play in the menu at the top of your screen and choose a playback option:
In Fullscreen: The slideshow plays on your primary display while the presenter display, with your notes and controls, is hidden. If you have a separate display connected to your Mac, the slideshow plays on your Mac while the presenter display is on the secondary display.
In Window: The slideshow plays in a window that you can share with your audience. To see the presenter display while the slideshow plays, move the pointer to the top of the slideshow, then click .
To stop sharing control with another presenter, move the pointer to the bottom of the screen to show the toolbar, click on your Mac.
Open a shared presentation.
Select Play > Play Multi-Presenter Slideshow. If another presenter has already started the slideshow, you can also click Play a Keynote presentation on MacAdd and view presenter notes in Keynote on Mac