How to insert a Signature in Word with DigiSigner You can sign in an electronic document and confirm its authenticity using the following method: Register with DigiSigner. How to insert a Signature in Word with DigiSigner. The algorithm is relevant for versions, and, as well as for Word Office Needed details will be added as an image in the center of the page than it needs to be moved to the right place and reduced in size. Using the image from the scanner standard tools it is needed to pre-cut the excess space around the signature.