The wallpaper is an image displayed in the background (root window) of your display. To change the wallpaper displayed, select one from the list or click the Browse button and select an image. If wish to use a One Color or Two Color background, choose No Wallpaper.
Choose from the Arrangement list to select how the wallpaper image is applied to the desktop: various tiling, mirroring, or scaling schemes are possible, and their effects may be seen in the Preview box.
You may also select Random which causes a random sequence of backgrounds to be displayed, changing after a specified time interval. Click on the Setup button to select the sequence of backgrounds that are chosen from. The sequence will be sampled randomly, unless you make the selection that the sequence is sampled in order. The Timer Delay box allows you to set the interval in seconds between changes. If the icon for the background display settings is docked in the Panel, and Random is selected, you can click on the icon to cause the next scheduled background change to occur immediately.
If the option Pick files from directory is selected, the backgrounds wil be chosen from the set of wallpaper files in the selected directory entered in the box that opens. If this option is not selected, they will be chosen from a user-created sequence of backgrounds listed in the main box.
To add an entry to this user-created sequence, click on Add; this will add a highlighted No Wallpaper entry for the currently-selected Color background from the main Background Display settings screen to the sequence. Click on an item in the sequence to highlight it. To replace this highlighted entry, go back to the main Background Display settings screen (without closing the Random mode setup screen) and deselect Random. Whatever Wallpaper (including No Wallpaper) you now select will replace the highlighted entry in the Random Mode background sequence. Click on Delete to remove the highlighted item from the Random Mode backgrounds sequence. In this way, you can construct any sequence of backgrounds you wish. Click on OK when you are satisfied with it. Don't forget to reselect Random in the main Background Display Setting screen to activate your Random Mode backgrounds.
Displaying wallpaper requires that the image be kept in memory. If you are low on memory, using a small, tiled image or none at all is recommended. Note that scaling or centering a small image still requires an image the size of your display to be maintained in memory.