Hi Kevin,
Thank you for contacting us.
A multiline editor is not supported out of the box in Xamarin Forms, but you can use a custom data form renderer for each platform to set up a multiline editor. I have attached a sample that demonstrates how.
Here you can find more information about editors.
Please, let us know if you have further questions.
Regards,
Rosy Topchiyska
Telerik by Progress
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