The Overview tab displays a set of related information on one page that was available previously only by switching among multiple tabs. Figure 1 shows the Overview tab for a sample application

The zip file contains a Perl script to handle switching operating systems in a general fashion, as well as some sample scripts for switching between Windows and Linux.

Instead of merely switching single variables in a file, he says his method changes the entire sample, making as many changes as possible that still allow a browser to recognize the file as HTML.