Hi John,
You can use the Goto method to position the caret on different text locations. For example:

m_RichText.Content.Goto(ENTextDocumentPart.Line, "11", true);

Positions the caret on the 11th line. You can use this method to position on page, section, paragraph, line and bookmark index. You can also position the caret using the selection object if you know the text position where you want to place the caret:

m_RichText.Selection.MoveCaretTo(someTextPosition, false);
m_RichText.EnsureCaretVisible();

Hope this helps - let us know if you meet any problems or have any questions.

Best Regards,
Nevron Support Team