Custom Summary Image
A Custom Summary Image is the image that shows up as a preview image for your current sub page. In other words, it's the image that shows up whenever your sub pages are listed on your web page. To add a custom summary image, click on the Add A Photo box, and select your photo from either your computer, your images that have been previously uploaded, or stock images provided to you by Atwill Media.
Custom Summary Description
The Custom Summary Description is the description of your sub page. It can be edited by clicking inside the text box, and adding your custom description.