Set the Dictation keyboard shortcut
You can customize the key combination you press to start or stop Dictation.
Tip: If the Microphone key is available in the row of function keys, you can press it to start Dictation.
On your Mac, choose Apple menu > System Settings, then click Keyboard in the sidebar. (You may need to scroll down.)
Go to Dictation, click the Shortcut pop-up menu, then choose a shortcut to start Dictation.
To create a shortcut that’s not in the list, choose Customize, then press the keys you want to use. For example, you could press Option-Z.
Note: When you choose a Dictation keyboard shortcut, depending on your Mac model, the “Press fn key to” or “Press key to” option in Keyboard settings may change automatically. For example, if you choose Press Fn (Function) Key Twice as the Dictation Shortcut option, the Keyboard settings option changes to Start Dictation (Press Fn Twice) automatically.
For more help with Keyboard options, click in Keyboard settings.