The Elusive Moons of Uranus
The display has several parts. At top is a diagram showing the positions of Miranda (M), Ariel (A), Umbriel (U), Titania (T), and Oberon (O) with respect to Uranus. Below the graphic are three buttons you can use to change the orientation of the diagram to match the view in your telescope. "Direct view" puts celestial north up and celestial east to the left; the routine opens in this orientation, which is the one used in most star atlases. "Inverted view" puts south up and west to the left; that is, upside down but not mirror-imaged (matching the view in a Newtonian reflector in the Northern Hemisphere). "Mirror reversed" puts north up and west to the left, matching the view in most catadioptric (mirror-lens) and refractor telescopes used with a star diagonal in the Northern Hemisphere.
Next comes the date and time. When the routine opens, it is initialized to the present (as determined from your computer's clock). Change the date and time by entering new values in the corresponding boxes and clicking the dark gray "Recalculate" button on the next row. Or click on the adjacent buttons to step backward or forward in increments of 1 day or 1 hour.