The keyboard opens automatically in the lower portion of the iPad screen when you tap within any editable field of Splashtop Remote Desktop. You can also open it by tapping the Keyboard icon at the bottom of the screen.
If you find that the keyboard is blocking a portion of the screen you want to see, you can use a "three-finger drag" to scroll the screen. Place three fingers above the keyboard and then drag in the desired direction. The entire screen will be moved accordingly. (Several types of screen-control actions are available.)