Zoho CRM custom button function, how to add line breaks/ new lines in the return message

Zoho CRM custom button function, how to add line breaks/ new lines in the return message

When creating button function in CRM it requires a `return "";`

Then when the button is client by the user a message pops up with what ever is returned from the function.

But I want to have a message with multiple lines, meaning I need to add a line break or new line.

Using "\n" does not work.