Hello Mojtaba Madadkhani,
Bookmarks can only be used in RadRichTextBox for now.
We have added support for Bookmarks in RadRichTextPageView to our to-do list, but it has not been scheduled yet. Therefore, the time frame when it is going to be implemented is not certain at this point.
the Telerik team
Explore the entire Telerik portfolio by downloading the Ultimate Collection trial package. Get it now >>