No problem, I can help with that. If the painting is less than 800 x 600 pixels in size, it will be displayed on the page directly, without needing to be opened. If the image is larger, then it is hidden untill you click the icon to open it.
800 x 600 is a pretty minimal size for screen resolution and you may find it to be worthwhile adjusting this. By the sound of it you're using a PC rather than a Mac, so you can raise your resolution by right clicking on your desktop, selecting Properties, going to the Settings tab and moving the slider "Screen Resolution" to the right. The next step will probably be 1024 x 768. You can click "Apply" and see if everything displays correctly. If it doesn't, don't worry, just wait a few seconds and your computer will automatically return you to the previous resolution.
It may be that you're running an older computer, or a computer with a small monitor, or simply that you have your screen resolution set at a low value. This would certainly allow you to see more of the image on the screen, but it's a matter of personal preference, some people do prefer to run at a lower resolution.
Hope that helps!