La Vie En Rose...
Go to settings>Design and their you can add a background to your account.
Yes, in settings.
Go to settings>Design Choose the desired background or upload an image that you want to use as your background.
Set the background color in background settings. You can also set a picture to be the background.
click on settings
settings/wallpapers
change power settings for the monitor change icon and shortcut settings desktop background and wallpaper
Yes, Go to screen settings and background. Uset the theme or your own.
Click on your profile pic>Settings>Design>Change Background image
Choose settings and then Themes.
it is the background or the place where your passage is going on.
You can change to a downloaded background through your xbox's settings so it displays behind your dashboard.