How do I highlight or under line a book that I put in PDF on my ibooks
How do I highlight or underline articles that I have downloaded PDF in iBooks
iPad 2, iOS 9
you likely need a pdf editor. adobe makes one and there are a lot of 3rd party ones. never used any, so i can't say which one i like best. you can probably try some out before you buy or maybe there is a free one or one that is limited but free.