Comments are a great way to get feedback on your prototypes.
In the Suggesting mode, you’ll find all the comments related to your prototype. Here, you can add, view, and modify comments directly to a prototype’s screens and on UI elements.
By clicking on the "Suggesting" view, you get a bird-eye view of all UI elements with comments. Just click on an element to view the comment, add new or reply.
Adding a comment
Click on the "Share an update" box to enter your comment.