Use the following entities (defined in the Modifier DTD):
<!ENTITY softReturn '&#x0007;'>
<!ENTITY hardReturn '&#x000D;'>
For example:
<STORY STORYDIRECTION='HORIZONTAL'>
<PARAGRAPH MERGE='false' PARASTYLE='Normal'>
<RICHTEXT MERGE='false'>This is a test&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&softReturn;Entered Soft Return&#x0007;This text is entered in the next line of same text paragraph</RICHTEXT>
</PARAGRAPH>
</STORY>