hi there, I am studying for an exam and FINALLY found my groove with my iPad and acrobat reader! I've been using the highlight feature with no problem and all of a sudden it just stops reflecting the highlight. I am able to select the words and do everything but it shows as if it were transparent in some cases. It registered the section to highlight but it's blank, the blue or yellow does not show up. I tried saving a copy of the document in Dropbox and pulling it up again...reopening the app, It seems to only have the problem on this and a couple other particular pages...it originally highlighted then disappeared. I can Move on to another page and it works again. Thoughts?
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On the basis of the information you have provided, it seems to me those pages either might be Scanned Pages or Pictures, which could give this kind of issue. If this would have been related to the whole document it would have been possible related to the access rights on the file. Let us know if you have any further questions. If you want us to take a look of the file, you may share the Dropbox link.