What button is used to display or hide speaker notes if they exist?

In most presentation software, such as Microsoft PowerPoint or google Slides, you can display or hide speaker notes by clicking on the "Notes" button or "Presenter View" option. In PowerPoint, for example, you can also use the "View" tab and select "Notes Page" to access the speaker notes. In google Slides, the speaker notes section is typically displayed at the bottom of the editing screen, and you can toggle it on or off as needed.