I also made the following comment in the Technical Discussion Board:
"Basically, the file you upload onto your computer is you master copy.
The screen copy the version of the picture that will fit onto your entire screen like a desktop background. In you don't know what your screen resolution is right click on your desktop background, then click on properties, and then settings. Mine for instance is at 1024X768 pixels. You are going to need to resize your master copy to be the same size as your desktop background.
Thumbnails can be made the same way you make a screen copy, by just resizing the image in either Paint or Photoshop or whatever you prefer.
If you are using Paint, you can adjust the picture size by clicking Image and then Stretch/Skew. I personally don't like this if you need an exact image size because it resizes by percentage and not measurement. If you need to know the pixel size of your image in Paint, click and drag the tiny blue dot at the bottom right corner of your screen. A box in the bottom right corner of your screen (just above the clock) will display the image size in pixels. This is also used to adjust the canvas size. Also, if you image is longer than it is wide, you may want to rotate it, otherwise it will be fat when you resize it to screen size. Do do this in Paint go to Image, then Flip/Rotate, click on By Angle, and then select either 90 degrees or 270 depending on which way you want the image to lie.
Unfortunately I dont have Photoshop on my computer but adjusting the image size is even simpler in there. I think you go to Edit, Adjust Canvas (or image) Size and then you can simply type in the pixel size you want.
I hope that helps and if any of these explanations are wrong or you think are wrong please feel free to correct me (I don't want the entire class to get it wrong!)"
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