To choose a different wallpaper, right-click the desktop and click Change Desktop Background. If you want to use a picture of your own as wallpaper, click the Add Wallpaper button, and then browse to its location.
In the Style drop-down list, you can select from the following choices, which affect how the wallpaper is displayed:
Centered: This option places the wallpaper in the center of the screen. If the wallpaper is not big enough to fill the screen, a border appears around the edge. If it's bigger than the screen, the edges of the wallpaper are cropped off.
Fill Screen: This option forces the picture to fit the screen, including squashing or expanding it if necessary (known as altering its aspect ratio). If the wallpaper isn't in the same ratio as the screen, it will look distorted, as shown in Figure 10-3. Most digital camera shots should be okay, because they use the same 4:3 ratio as most monitors (although if you have a widescreen monitor, a digital camera picture will be stretched horizontally).
Scaled: Like the Fill Screen option, this option enlarges the image if it's too small or shrinks it if it's too big, but it maintains the aspect ratio, thus avoiding distortion. However, if the picture is in a different aspect ratio than the monitor, it may have borders at the edges.
Tiled: If the picture is smaller than the desktop resolution, this option simply repeats the picture (starting from the top left) until the screen is filled. This option is primarily designed for patterned graphics.
Don't forget that the GNOME Art web site (http://art.gnome.org) offers many wallpaper packages for download.
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