This sunrise photo ...
... wouldn't have nearly the same impact if I had left it the size that Blogger made it when I imported it into this post. See?
The size that a photo appears in my posts has nothing to do with the photo's file size. All of my blog photos are 640 x 480. I save them this size I when I edit them in PhotoShop. (That's also where the watermarks come from)
While writing a blog post, when I insert a photo, it looks like this on the screen:
Click on the photo in the Blogger editor, the photo will highlight and a bar with various selections will appear below it. To display the photo as large as possible, which I do, click 'X-Large'.
Your photo will now look like this:
and when you publish your post, your photo will be big and beautiful!
Any Questions?