Background Position
The CSS background-position property sets the initial position for background images. The background position can be set using the keyword values top, bottom, left, right, and center. There is way too much information to cover all of the options available for background-position, so if you want to learn more follow the link in the banner above.
Background Attachment
The background-attachment property sets whether the background scrolls with content or not. The syntax is background-attachment: (keyword);. The keyword values are scroll, fixed, or local. With the property value set to fixed the background is set to the viewport. So if you scroll the background doesn't move with the content. If set to scroll the background is set to the element's border and thus doesn't scroll with the contents. Click the banner for more information.
Background Size
The background-size property sets the backgrounds color... oops sorry silly me, the background-size property sets the size of an elements backround image. The properties keyword values are contain, or cover. If set to cover the image is scaled to fill the container element. If the dimensions of the image are different from the container, it's cropped appropriately to fit because the images ratio is maintained while scaling. Click the banner for more info from MDN.
Background Edge Offset Value
The edge offset value is set in the background property. It specifies the distance the image should be placed relative to the edge of an elements box. The keywords top, bottom, left, right, and center are all options. The actual position from the edge is set using the x and y coordinates. For example: "background: url(image goes here) no-repeat top 10px left 10px;" would place an image in the container in the top left corner 10 pixels from the top and left edges without repeating.
Multiple Stack Order
When using multiple backgrounds the last one listed is the only one that can specify background color. When applying multiple backgrounds to an element the first one listed is on top, and the second one is below that, and so on. As stated previously the background color has to be listed last because it will go underneath all other images listed.
Summary
There is a wealth of information about background properties to explore. What I'm beginning to understand is that background design is one of the most important design elements to master. In the past, I considered background to be an after thought. From gradients to actual images the background design can mean the difference between a kindergarten drawing and a gallery print. That being said, I would like to make this more appealing but I just don't feel that I have the time assets to spare to play with the design of this page.