1. First of all, we need to prepare a person's handwritten signature before making an electronic document signature.

2. After the handwritten signature is ready, we open the Excel document, then click Insert and select the picture.

3. Then we find the prepared handwritten signature picture and click Insert.

4. After inserting the prepared handwritten signature, we click on the picture, then enter the picture format, set the page, select the color, and change the picture to 50% black and white.