Yes, you can! If you have made notes and/or highlights on an ebook you have been reading online on VLeBooks, you can download these by selecting the Annotations icon on the left-hand menu; you then have the option to export:-
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You also have the option to delete any highlights or notes you made by hovering over the line of text/annotation you wish to remove - you will then see the dustbin icon you need to click to delete:-
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Any queries or support required, please contact the Library.