You can delete, revise, or draw shapes in a Word document using your digital pen and touch screen device. This video gives a 30 second overview of how you can use a digital pen to edit Word documents.
Check out the article below for more information.
Draw and write with ink in Office https://support.office.com/article/draw-and-write-with-ink-in-office-6d76c674-7f4b-414d-b67f-b3ffef6ccf53