Good Gear Guide
In Pictures: The best office apps for Android tabl...
The best Android tablet PDF markup app
Only one office contender allows you to highlight and mark up PDFs: Pro HD. Given that it lags behind the others in many areas, I wouldn't recommend spending $20 for this function alone. Instead, grab Unidocs' ezPDF for $2. ezPDF packs many features into a slick-looking interface that translates nicely to the tablet form. It lets you annotate documents with text or freehand drawing. You can highlight or underline, add in shapes and images, and crop or rotate preformatted pages. The app can select text for copying to your system clipboard for use in other apps. The program's free cloud plugin add-on allows you to connect directly to your Google Docs account for seamless in-app access to cloud-based files.
In Pictures: The best office apps for Android tablets