Click the left mousebutton or "Z" where you want to zoom in, Click the right mouse button key or "z" when you want to zoom back out. You may enter coordinates yourself. Apparently undocumented feature: pan with the arrow keys.
Applet by Steffen Thorsen.
In mathematics, fractals are a class of complex geometric shapes that commonly exhibit the property of self-similarity, such that a small portion of it can be viewed as a reduced scale replica of the whole. The term fractal is derived from the Latin word fractus ("fragmented," or "broken"). Fractals are distinct from the simple figures of classical, or Euclidean, geometry (the square, the triangle, the circle, the sphere, etc.) They are capable of describing the many irregularly shaped objects or spatially nonuniform phenomena in nature that cannot be accommodated by Euclidean geometry.