Thanks to provide the URL of the graphic source of your choice.

The graphic source can be an image or a video. The allowed type of sources are browser dependant. The most common image type are JPEG, PGN and GIF. For the video, based on your browser, it could be OGG Theora, WEBM or MP4 H.264.

Automatic

The real size of the source is preserved except if it oversized the window size. In this case, the source size is changed to fit the window size.

Original size

The real size of the source is preserved even if it oversized the window size.

Window size

The graphic source is resized to fit the window size.