In the following structures carbon atoms are dark gray and hydrogens are cyan. The molecules are initially shown as mirror images, and can be moved by clicking on the structure and dragging the mouse. Holding the shift key during this operation allows zooming. To see the plane of chirality click the third button. The configuration is determined by viewing the chiral plane from the nearest out-of-plane atom (there are two equivalent pilot atoms in this case). By clicking the fourth button, one of these will be colored magenta, and three adjacent atoms in the plane (colored orange) will describe a right or left-handed arc.