At the bottom of the screen, in flight you will see a bar at the bottom of the screen with various instrument parameters displayed.
This bar is called the "Instrument Dock" and can be customized to your preferences.
Touch and and hold on any of the docks displayed to reveal the menu.
While still holding, gently slide left or right through the instrument pages. Next slide up or down to highlight an instrument, and when you locate the one you want for that dock, simply let go. The dock will now display the selected instrument.
All of the most important instruments and flight information such as; Air Speed, Ground Speed, Altitude AGL (At Ground Level) Altitude ASL (At Sea Level) Way Point, Heading, Flight Time, Weight, etc can be found and saved to your instrument dock. It will remain the way you left it when you start a new flight, until you change it.