LibAnswers

Under the terms of fair dealing you are permitted to copy a limited amount for your own private study or for non-commercial research although the law does not specify exactly how much you may copy. 

The University states that amounts copied must not exceed either singly or in aggregate the greater of 5% of any published or, in the case of a book one complete chapter, or one whole journal article from a single issue of a journal. 

Any printing from an ebook will normally be pre-set by the publisher or platform you are using, and you will be notified when you have reached your limit.