First you need to launch your copy of the HTML Editor. Then go to the Edit menu option, and select Internet Configure.

This will launch the Internet Configure application. Next, click on the Helpers button.

Once you have clicked on the Helpers button, a dialogue window will appear that will show you all of the various applications that you can configure. You will want to highlight the option that says http, and then click the Change button.

Next, a dialogue window named Add Helper will appear that will ask you to choose which application you wish to use for the http option. Click on the Choose Helper... button. This will bring up another dialogue window where you will navigate to a copy of Netscape on your hard drive.

If you have completed these steps correctly, the Helpers dialogue window should look like this:

Finally, close the Helpers window, and go to the File menu, and Save your new configuration. Then go back to the HTML Editor, and click on the preview icon
. This should preview your HTML document in Netscape.