Google's Search Box: Your Site or the Web

Google's Search Box has a little back dot for you to change depending if you want to search this site or do a web search (view above). You will see the little black dot set on my site and if you want to search the Web, you will need to change it.

If you are interested in changing the black dot on your Google's Web Search to Your Site Search, it is all explained here for you.
Google's Web Search vs. Your Site Search