To view or add notes to portfolio items, you have to navigate to the student in questions profile. Click on the class they're in, then click on the diagonal arrows on the top right of their student tile.
Click on Portfolio to see a list of all items added to the student's portfolio.
To view or add notes, click on the ellipses to the far right of the applicable item, then click Notes.
Here, you can view a list of all notes added to that particular item. To add a new note, click + Note.