A soft break or soft return is a carriage return automatically inserted by the software program usually because of a word wrap. Soft returns allow you to continue typing without having to press the return key manually at the end of each line. The picture shows an example of soft returns with formatting marks enabled. The soft returns look like an arrow that goes down and then points to the left, much like the arrow seen on the enter key.
In the picture above blue line indicate hard carriage return and red soft carriage return.