Use the following entities (defined in the Modifier DTD):
<!ENTITY softReturn '&#38;#x0007;'>
<!ENTITY hardReturn '&#38;#x000D;'>

For example:

<STORY STORYDIRECTION='HORIZONTAL'>
<PARAGRAPH MERGE='false' PARASTYLE='Normal'>
<RICHTEXT MERGE='false'>This is a test&amp;softReturn;Entered Soft Return</RICHTEXT>
</PARAGRAPH>
</STORY>

In order to modify, open the in any text editing application and make the followingchanges:

<STORY CLEAROLDTEXT='true' STORYDIRECTION='HORIZONTAL'>
<PARAGRAPH MERGE='false' PARASTYLE='Normal'>
<RICHTEXT MERGE='false'>This is a test&amp;softReturn;Entered Soft Return&#38;#x0007;This text is entered in the next line of same text paragraph</RICHTEXT>
</PARAGRAPH>
</STORY>