Clicking the tool will allow you to enter the web address you wish to visit. In the case of the PrintIT website you need to enter www.printit-at.com . Then click Add. The web address will then appear in the right hand box. Select it and you can now Remove or Visit the site. Clicking visit will take you to your chosen site.
NOTE - you must already be connected to the internet via your Internet Service Provider.
You can add more website addresses as needed. Great if you find a good graphic site or free images site that you want to continually use.
The right hand side of the interface covers functions that are file and print related.