On the next page, you can configure the following settings:
Use a custom background image
Check to enable a custom full-screen background wallpaper for your theme. This can be used to temporarily replace the default background image of your theme, if one is used. Note that this feature applies your custom background image to the <html> tag of your page, and removes any background color or image of the <body> tag. This feature by default is set to stretch the custom image to the full size of the page. You can edit your background wallpaper on the left menu properties: "Custom Background - Desktop". There are also optional entries for tablet and mobile wallpapers.
Use floating content mode
When using a full image background, by default your forum will be placed inside a solid boxed content area. Check this setting to make your content float separately over the background image.
Enable background slideshow mode
Check to enable a fullscreen background rotation feature. You can enter up to five background images and specify the duration and fade time of each image.
Path to backgrounds #1-5
Enter a URL address to each background wallpaper you'd like to use. Leave additional fields blank for each wallpaper slot you do not use.
Background duration time
Enter the amount (in milliseconds) for each image to remain visible before changing to the next. I.e. 4000 = 4,000 milliseconds = 4 seconds.
Background fade time
Enter the amount (in milliseconds) for each image to fade into the next. A smaller value will produce a quicker transition between backgrounds.