Displaying the Structure of Molecules
The image on your left shows a short length of DNA. The atoms are shown as spheres and are coloured according to the type of atom.
(Carbon: grey, Oxygen: red, Nitrogen: blue, Phosphorous: orange)
The best way to get an impression of the three dimensional shape of the DNA molecule is to watch it move. You can do this using the mouse. Try positioning the mouse over the DNA molecule on your left, holding down the left mouse button and dragging (in all different directions). Notice how the DNA appears in 3D when you are moving it.
If you want to look more closely at a particular part of the molecule you can press the "Shift" key on the keyboard, hold down the left mouse button and drag the mouse (up and down). This will allow you to zoom in and out. If you want to return the DNA to its original size and orientation press the following grey button