Mac OS X: How to Summarize the Contents of Documents
If you have a long document, you can use the Summarize service to get a summary of the contents. For example, use this to get a short version of a long page on a Web site.
To get a summary of a document, select the text and choose Services from the application's menu, then choose Summarize.
If the application you are using doesn't support services, copy the text to a TextEdit document to get a summary.
Note: The information is this document comes from Mac OS X Help, the help system included with your computer. It is based on Mac OS X 10.1.2. If a different version is installed on your computer, choose Mac Help from the Help menu. Updated and expanded information may also be available in other Knowledge Base documents.