Within a text box, there are two main ways to insert a return line.
The first is by simply pressing the 'Enter' button on the keyboard. The second way is by holding down the 'Shift' key while simultaneously pressing the 'Enter' key.
When creating a new paragraph within the text box, we would recommend the user creates this with the second method.
When creating a return line with the first method, a small space is automatically inserted within the gap, as a result users may misunderstand this as starting a new paragraph.
The examples are shown below: