The Delete Background Image feature is located in three places: the Edit Menu, the Toolbar and the "Right Click Menu".The “Delete Background Image” icon, a picture of snow-capped mountains with a red (X) sign, allows you to delete a background image.
To delete a Background Image:
Click the "Delete Background Image" icon
Any bitmap background image you may have loaded will disappear.
Note:
This will only delete the background image of the page you are currently viewing.
The "Delete Background Image" button will be "grayed out" (not
usable) if you have not loaded a background image.