Whereever it comes from, libertyangel, I hope there are a lot more from that artist!
I do like these as big as they are, I don't mind scrolling to the right. Sometimes however, when I post my own pictures, I do want them all to fit on the window at one time, so I edit the width. After I copy the URL and cliick on the Insert Image button, I edit the [img] on the left to say [img width=300] and then the Preview button to see how that comes out. Depending on the picture, I edit the width up or down until it previews to the right size, then I post it.
When you are looking at someone else's pictures and they don't all fit in, one thing you can do is to click on the posting person's name at the upper left of the post, then click on 'show the last posts of this person' near the bottom of their profile window. The window that comes up doesn't have the column for advertising on the right, so the whole picture may show without scrolling.