Hi Omar,
Syncfusion Greetings!
Documenteditor rendering follows convas rendering approach. When print, Document editor converts canvas as image for printing, its quality is low when compared with MS Word.
To print the document editor content with high quality, you can send the document editor content to server-side and convert it to pdf using DocIO and return the pdf document as base64 string to client-side and open it in preview window.
For your reference, please check the below sample which is in MVC.
Here is the DocIO documentation on converting word document to PDF. Kindly check it.
Regards,
Suriya M.