If your images are too large it will be difficult to upload them to the web site. Often digital camera images can be several megabytes in size, these are too big to upload across an Internet connection efficiently!
Also many images have large physical dimensions which is why their file size is so large. To use images for use on the web it is best to resize them to make their dimensions no more than 800 pixels wide and then re save in .jpg format.
Programs such as Photoshop, Fireworks, IPhoto or other graphics software can be used to optimise your images by changing their physical size.
One recommended software package is PIXresizer, or Batch Thmbs, Both these packages are free program’s that will let you resize a whole folder of images at once – you can download PIXresizer from: http://bluefive.pair.com/pixresizer.htm and Batch Thumbs from http://harmware.net/bthumbs.htm
Both programs offer good turtorials
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