It is possible to delete a highlight, a note, or a note and highlight.
Removing a highlight:
Tap on the highlighted text in the book and tap "Delete" on the pop-up; this will delete your highlight.
Removing a note:
-Tap on the highlighted text with an associated note in the book
-Tap edit note to bring up the Notebook
-Tap Cancel to hide the keyboard
-Tap More in the lower right-hand corner
-Tap Clear Note to remove the text
-To return to the book, tap on the X in the upper left-hand corner
Removing a note and highlight:
Tap on the highlighted text with an associated note in the book and tap Delete. A pop-up will appear asking to confirm deleting the highlight and associated note. Tap Delete Highlight to delete the highlight and note.
Please Note: There is no way to restore a delete note or highlight.