* Create tree-like index. You can click the index and jump to the chapters which you want. <BR> * Add and delete bookmarks. You can also click the bookmarks to locate the section which you have indicated. <BR> * Enable highlight and cancel highlight, mark everything you like! <BR> * Record the location which you are reading. It will jump to the section directly when you open the document again. <BR> * Each child window support independent "find and find next" features. <BR> * Support toggling open files tabs. <BR> * Auto-save your configuration.