Once you have installed and started Splashtop Streamer on your computer, you can launch Splashtop XDisplay on your iPad, and your computer should automatically show up in the list of available computers. This step may take up to half a minute, depending on your network. Simply tap the name (or icon) of the computer in the list to which you want to connect. You will be prompted for your security code. You can later store it so that you do not need to enter it every time. To do that, click on the arrow button next to the computer name before initiating a connection.
The first time you connect, a Hints screen will display, telling you what gestures can be used during the Splashtop XDisplay session. After you close the Hints screen, you will see that your desktop is now extended to your iPad screen.