Some unhelpful instructions:

• When an image has rendered, drag a rectangle in the applet and it will zoom in on it.
• Press reset to return to the original view.
• Press stop to abort a render
• Press start to start a render
• Move the detail scrollbar to set a new detail level (greater detail=slower render)
• Move the real and imaginary scrollbars see another Julia set. As a starter, a nice one exists with real=0.3, imaginary=0.5 another nice one is real=-0.45, imaginary=0.59.