Hi Harley, you need some sort of picture editing software, I use Adobe PhotoShop, but there are many others that will work just as well. First go to "Image" on the tool bar(Chosen file, image, must be open), click on "Image Size" and a box pops up with the first dimension in pixels highlighted. I usually start with 480 pixels and then the next dimension automatically adjusts itself to 360 pixels, then the file resizes itself. Now you have to save it. Go to "File" then "Save As" and name it. Choose your file format and then click once and the appropriate file extension is added, click again and the resized file is saved. Then another box pops up with Jpeg options, my format of choice for the web, and select or accept "3" Medium for quality level. Click OK and you are done. I go through all of this because I use the highest resolution my camera produces as the default setting, but you could just use a lower file size initially. Hope this helps, Russ