Click on image space to start and wait for image to load.

• Click to zoom in
  
• Shift-Click to Zoom Out
  
• Press & hold mouse button to zoom slowly
  
• Shift & hold mouse button to zoom out slowly
  
• press 'a' to fit image to applet
  
• press 'f' to get full size 1 to 1 image
  
• press 'w' to fit to applet width
  
• press 'h' to fit to applet height
  
• press 'c' to center the image