The foot is the area on the bottom of your screen that looks like the head.
You can change the appearance of the foot with the following options:
Content - you can change the content in the header by using the word box. When you first create a site, your website info automatically becomes the content. This is just the default to get you started. Whatever you enter into the word box for the "Appearance->Head" section will replace the default title and description.
Background color-This will be the main color of your header. If there is no image, or space left over not occupied by an image you chose, this will be the color of the rest of the area.
Background Image-you can place an image behind the text by choosing a photo from your file manager. You will have to upload a file if you have not already done so.
Border- This will make your head stand out more against your main background.
Padding-This adjusts the width between your text and the edges.