You can explore with your mouse, the control buttons on your keyboard or the control icons on-screen.
Using a mouse: Click and drag the cursor on-screen in the direction you want to look. If your mouse has a roller button, use it to zoom in/out.
Using on-screen icons: Click and hold the screen icons to navigate. The + (plus) and - (minus) buttons allow you to zoom in/out.
Using keyboard arrow keys: Press the arrow keys to navigate. The + (plus) and - (minus) keys allow you to zoom in/out.
Using keyboard tab keys: Tab through the on-screen buttons and hold down the space bar to navigate. Shift + tab will tab back to the previous on-screen button.