Hi, @JosephAI-6182 ,
If you mean the out-of-box alert message which you can set directly from the ribbon, you cannot customize the notification message. The available approach to create customize alert notification will like below:
- Use workflow or flow to send the alert email with the body you like.
- Create a custom code solution using event receiver or other tools.
And you can vote in UserVoice for this idea so MS get your thoughts.
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