Hi @mizuno mutsugi,
    you are you fetching a data Externally means we couldn't add a new line there, But while assigning a Out parameter or in on after fetch, we can check add a new line with inbuild functions.

Hello, @mizuno mutsugi 

I am attaching similar post based on New line and line break. Both these solutions will helps you. 

https://www.outsystems.com/forums/discussion/57828/how-to-break-lines-in-an-expression-widget/#Post219173

https://www.outsystems.com/forums/discussion/30512/how-to-display-the-text-to-newline/#Post107421

Thanks & regards

-- Priya Jhode

Hi,

You can add CSS " word-break: break-word; " in the container of the text.

Hope this helps!

Regards,