CSS Properties are divided into Categories within Expression Web's Style Builder.  Here are those Categories with their respective css properties:

• Font Category
  • font-family
  • font-size
  • font-weight
  • font-style
  • font-variant
  • font-transformation
  • color
  • text-decoration
• Block Category
  • line-height
  • vertiical-align
  • text-align
  • text-indent
  • white-space
  • word-spacing
  • letter-spacing
• Background Category
  • background-color
  • background-image
  • background-repeat
  • background-attachment
  • background-position(x)
  • background-position(y)
• Border Category
  • border-style (top, right, bottom, left)
  • border-width (top, right, bottom, left)
  • border-color (top, right, bottom, left)
• Border Radius Category
  • border-radius
• Box Category
  • margin (top, right, bottom, left)
  • padding (top, right, bottom, left)
  • box-shadow (new)
• Position Category
  • position
  • z-index
  • width
  • height
  • top
  • right
  • bottom
  • left
• Layout Category
  • visibility
  • display
  • float
  • clear
  • cursor
  • overflow
  • clip
• List Category
  •  list-style-type
  • list-style-image
  • list-style-position
• Table Category
  • table-layout
  • border-collapse
  • border-spacing
  • empty-cells
  • caption-side