Resizing your photos in a photo editing program will help make your page load much faster and keep you from using up all your free photo space on Picassa. (It's what you get when you create a blogger blog.) If you don't have a editing program on your computer you can use a photo hosting site like Picassa, Photobucket or Flicker to do it on-line. Or, you can use an on-line photo editor like PicMonkey. I usually size my photos to 800- 1000 pixels wide or tall. That makes them large enough to be easily viewed when clicked on but keep the page loading quickly.