Tracker's PDF-XChange Pro 2012 ($74) bundles a number of PDF-XChange apps that together attempt to create a suite comparable to the $449 , just for much less money. According to Tracker, PDF-XChange ...

本文介绍了PDF-XChange Viewer这款功能丰富的PDF阅读工具的使用方法。该软件不仅完全免费，还具备多种实用功能，如添加各类标注、多标签页浏览、快速批量搜索、页面放大与导航等，极大提升了阅读体验。它支持将PDF内容导出为图像，操作便捷，效率高。

The PDF viewer you choose is really dependent on what you need to do with the PDFs you download, but when it comes to viewing and editing PDFs, PDF-XChange Editor is the best program around. [jump] ...