Highlighting text??

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http://www.mobileread.com – Hello, Please excuse my ignorance, brand new to this world of ereader/tablets! Just recently bought my daughter this tablet: Double Power (DOPO) - MD-702 - 7 inch Capacitive Screen Android 2.3 Tablet. Great little tablet, works great! She loves it! The only thing we can't figure out is how to highlight text, or if its even possible. I know it has the Kindle Reader installed. She downloaded some study material in ePub format. She can open and read it fine. But is unable to highlight text. Any help with text highlighting would be awesome!! Thanks!! (HowTos)