It seems that on iPad, iBooks, Kindle, or Kobo won't show any user highlightings?
For example, just go to https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/ObjectiveC/Introduction/introObjectiveC.html and you will see at the top right corner to download the PDF file. Right click and save it into your Mac or PC, and use Acrobat 10 or Mac's Preview to highlight the word "Objective-C" on the frontpage of the file. We can close and re-open the file to see the highlighting.
Now use DropBox or Box.net and transfer the file to iPad's iBooks (I am using the New iPad (3rd Gen)). (Done by downloading the file and "Open With" iBooks). The highlighting won't show up at all.
This is a simple test... the other document which I highlighted for many pages also won't show any highlighting either.
Is there a way to make the highlighting show
- in iBooks
- in other apps?
I tried also the Kindle app and Kobo app on iPad and they won't show the highlighting either.