It compresses file sizes significantly, and downloads one page at a time for faster viewing. Documents look the same, whether your readers use Navigator or Explorer. Support for online forms is extensive. In Acrobat 4, Adobe has added Web Capture. This feature lets you convert single Web pages, levels of sites, or entire sites to PDF files.
Links remain intact.
As a warning message indicates, if you choose to convert a whole site, the operation may take a long time and a large amount of disk space. In Acrobat 3, you were limited to adding text notes to a PDF file. In the new release, Adobe has added a slew of tools for collaborative review. You can even embed comments as a file within the file. Acrobat now lets you mark up areas of a file with lines, rectangles, and ellipses.