You can share your favorite pages with others by sending them a URL.This is one of the reasons why Autodesk shifted away from CHM files to web based files that are more accessible across all operating systems. The downside to CHM files is that they are bulky in size, and therefore not easy to update. CHM files in of themselves are really a series of HTM and JavaScript files all bundled together into a single packaged file and were specific to the Windows platform.

The CHM files have been retired from use in AutoCAD and in their place are a series of HTM/HTML files. As you might have already noticed, the AutoCAD 2011 Help system looks a bit different.