The stars are located on the toroidal sky.
All elements are draggable. Big white circle is signifying telescope.
You may mouse-scroll it for rotation.
Now press on:
To find where is this place (constellation) is located on the sky press:
Now you can see circle on the sky (if you don't see it just move(drag) around the sky).
Also you need to mouse-scroll the telescope to see that it is exactly the same place (constellation).
Optional: Press "F" key to get "stars tag" from any place on the sky. It use to determine: is the constellation that was found is the same as in telescope circle.