Thanks for the question. It sounds like you are interested in using Dictation with your new MacBook Air. I understand you are currently looking at the dictation settings in System Preferences. If you wish to use dictation in a specific application (and see the awesome result), follow these steps:
1. Place the insertion point where you want the dictated text to appear.
2. Press the Fn (Function) key twice, or choose Edit > Start Dictation.
3. When you see the microphone icon, speak your text.
To insert a punctuation mark, such as a period or comma, say the name of the punctuation mark.
You can also perform simple formatting tasks. For example, say “new line” or “new paragraph” to insert space between lines.
4. When you’re done, press the Fn key or click the Done button.
Your spoken text appears.
Unclear text is underlined in blue. If the text is wrong, click it and select an alternate, or type or dictate the correct text.
For additional information, see this article: