1, sign on the white paper, then take photos with your mobile phone or camera, import the photos into the computer, and cut the size. 2. Insert the cropped picture into the appropriate position in Word and adjust its size. 3. If the color of the signed picture is different from that of the page, you can increase the contrast (double-click the picture and select the Picture tab to adjust the contrast) until the color is the same. 4. Double-click the image to set the image format as non-embedded (such as floating above the text). At this point, you can drag the image to any suitable position.

The so-called "Word document" is a format of electronic documents (suffix named docx), and the software that opens this format document is called Word.