Kindly wait when Image is being loaded.(Button will stay pressed untill the new image is loaded.)
Details :
1. 'Zoom in' and 'Zoom out' are w.r.t the center of current image. Zoom is 5x.
2. 'More detail' and 'Less detail' options change the pixel size and number of iterations made per pixel. More detail option decreases size of pixel by factor of 1.5 and increases number of iterations by factor of 1.5.(more details will take more time to create the image!).
3. Movement options shift the center towards corresponding end.