Users are opted in automatically, so if you don't like contributing don't install on autopilot. When you install it, it will ask if you want to contribute anonymous usage data. In testing, Nitro's functionality kept pace with its comprehensive toolset. You can also customize the ribbon, placing your most commonly accessed tools where you need them.

If you don't like or need the ribbon, you can hide it with an arrow that lives to the left of the search engine. This may still frustrate some users, but it feels slick and connected to Microsoft Office. Nitro sports a ribbon-style interface borrowed from the previously released paid version of Nitro. The highlight tool will switch automatically from box highlighting to character highlighting, depending on whether you start highlighting in an empty space or over some text.

The drag-and-drop took a few seconds to begin once initiated, but overall converting a four-page Word document took about 2 minutes. The search utility isn't bad, although it would be nice to see Windows 7-style federated in-document searching. This may sound like standard PDF boilerplate, but it's important to emphasize given that they're all free here, and they all work well. Users can comment on PDFs using notes and text markup, fill out forms, print to PDF, or create one by dragging an existing document into Nitro, share and comment with others, and securely sign a document. To put it mildly, the feature set is robust.

Nitro has turned the free PDF alternative business model on its ear by providing you with a smart selection of watermark-free editing, drag-and-drop PDF creation, and tabbed PDF reading. Nitro's new free PDF reader takes the key features that you want in a PDF reader, a familiar interface, and smooth functionality and combines them into an eminently usable program that doesn't get in between you and your documents.

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