How to link an external document in a word document?

To link an external document in a Word document, first highlight the text or image you want to use as the hyperlink. Then, right-click and select "Hyperlink" or press Ctrl + K. In the dialog box, choose "Existing File or Web Page," navigate to the location of the external document, select it, and click "OK." This will create a clickable link that opens the external document when selected.