Hi Priya,
Thank you for your interest in Syncfusion products.
Currently Essential DocIO does not have UI control support for editing the word document. Essential DocIO creates or edits word document programmatically. Please refer the following UG link for more information.
http://help.syncfusion.com/ug_93/Reporting/DocIO/ASP.NET/default.htm?turl=Documents%2F42worddocument.htmPlease let us know if you have any questions.
Regards,
Poornima