You can add comments to the Assets from Examine Asset, and Review Asset page.
To add Comment:
From Examine Assets page, click Add Comment button, the pop-up comes up.
Enter the text in Enter Text box and Annotate image by using the provided tool tip.
Then click Save Comment button, the comment will get listed in Examine Asset page → Comment Section.
You can edit the comment by clicking Edit icon and also delete the comment by clicking Delete icon.
If you click Submit for Image Edit button the asset will move to Tasks List page → Assigned By Me tab.