It's in the blue ribbon at the top of the Word document. A toolbar will appear at the top of the window.  To open the document, double-click on it. This is a drop-down box in the "Tracking" section of the toolbar. A menu will appear. On Mac, click the Markup Options drop-down box instead. Clicking the ✓ Comments option in the menu will remove the checkmark and hide the Comments sidebar.
माइक्रोसॉफ्ट वर्ड डॉक्यूमेंट खोलें और Review टैब पर क्लिक करें: Show Markup Comments