It’s hard to beat Google Docs as a collaborative tool. The fact that it lives within the Google ecosystem, is pretty fully featured, and can be used from basically anywhere has helped it gain fame against long-established competitors such as Microsoft Word. There are lots of ways to add annotations and feedback to documents within Google Docs, but if you’ve ever found yourself in the need to do it the old-fashioned way (with pen to paper) instead of the modern way, Google Docs has your back, too.
Source : Google Docs Now Has Handwritten Annotations, Like OneNote
