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Content: Slide notes are also a good location for adding extra information about a slide, such as numerical details, supporting materials, or footnote text. Add slide notes
Select Window > Slide Notes. In the Slide Notes panel, click  to add a slide note. Type the slide notes. Set formatting options (bold, italic, or underlined) for the slide notes. Click the TextColor button for more to add color to the slide note text. Slide text color palette
To generate audio for your slide notes, click the Text-to-speech     button  . On the dialog, you can preview audio, manage speech agents, modify the slide notes, restructure the notes, and so on. Choose the slide notes for which you want to generate the audio. You can assign unique speech agents for respective notes.