Notes panel. Notes sorting by text added
To the right of the sorting by the color control, there's another control that can sort the notes by the existence of the text in them. The default option here is “All notes”, this option shows all the added notes whether or not they have the text added. Single click within this control area and select to show the notes with your annotations (“With comments” option) or without the annotation (just highlighted text, “Without comments” option).