Open the Word document
Place the cursor where you want the signature
Go to the Insert tab
Select Pictures if you have a scanned signature image
Choose the signature file and insert it
Resize and position the signature as needed
Or go to Insert
Select Signature Line
Fill in the signer details if prompted
Click OK
Sign the signature line if using a digital signature
Save the document
Or go to Draw
Select a pen tool
Write your signature with a mouse, stylus, or touchscreen
Adjust the size and placement
Save the document