How to Add Speaker Notes in Google Slides
You can add speaker notes to a presentation as you're designing it to remind you what to talk about.
Each slide has its own notes, which are displayed in a pane at the bottom of the window.
You can also toggle the speaker notes pane off if you don't need it, or if you need the screen space for your presentation instead.
The speaker notes pane is hidden, but the top border of the speaker notes pane still appears at the bottom of the window.
The speaker notes pane reappears.