Once downloaded, you can open the photo file with the software, go to Image>Resize/Resample and a window will appear showing you the current size of the file. I usually resize my photos to a width of 800-900 pixels for thread posting. The software will automatically select a height in scale with the width which you select. Once I'm satisfied with the size of the new photo, I go to File>Save as and save the file in a folder for uploading to my photo storage website. Then it's just a matter of uploading and copying the URL into your posts.
Thank you so much. I really appreciate your help. Since my PC here at work will not let me download any software I'll have to work on that from home this evening on my new laptop that Santa brought me.