The possible view directions for equatorial or ecliptical coordinates are...
•Equator - The line of the equator or ecliptic is shown horizontally across the screen, with the north pole upwards and the south pole downwards.
•North Pole - The view is towards the north pole, with the pole in the center of the screen.
•South Pole - The view is towards the south pole, with the pole in the center of the screen.
For local coordinates...
•Horizontal - the line of the horizon is shown horizontally across the screen.
•Above Horizon - The view is upwards, with the horizon around the edge of the screen.
•Below Horizon - The view is downwards, with the horizon around the edge of the screen.
When you select the required view direction from the drop-down list box, the display will be updated automatically to reflect the new coordinate system.