Notes will show up if your client views a meal plan on Eat This Much (both web and mobile apps), and will also show up if you create a PDF or email out of a meal plan. If you copy a meal plan, the notes will be copied with it.
Here's how to add notes:
You can click the note or use the same button to make edits.
When you create a note, it will look like this in the plan:
You can also switch to your client's accounts to leave notes directly in their calendar of meal plans.
Meal Notes will persist when regenerating a meal (and even when regenerating the day or week). If you'd like to remove a note, simply click it, highlight the text, delete the text, and save it again. If the note is blank, it will not show up anymore.