Instead of selecting the type of message sent each time you send one, streamline the process with this quick setting.

When your first start using Messages on your Apple Watch, you’ll notice the option to select if you want to send a voice note or a transcribed message when you compose a new message.

The option is nice to have, but time consuming if you’re carrying on longer conversations. Not to mention it’s easy to forget about the extra step and leave a message unsent.

With a few seconds of your time and a couple of taps, you can set the default option and forgo the need to constantly make a selection.
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Read full post here:
https://www.cnet.com/how-to/set-a-default-reply-option-for-audio-messages-on-apple-watch/