Selectors:
The "Use CSS Selector" option in the Create New Styles Dialog box creates additional style options, such as for your <a> tags for links. You can use the pull down menu to do this. This is the same thing you set in Page Properties, but the colors you set in Page Properties will overwrite the one's set in the style sheet. So if you want to set you like colors universally, you just don't select any colors for page properties and do it with the "Use CSS Selector" option.
*note: You can also create
selectors with this option. See: ID vs Class.
a:link (is
the style for normal state of links)
a:hover (is
the style for the over state when your mouse is over the link)
a:active (is
the style for a currently selected link)
a:visited (is
the style for a visited link)
a:focus
(if the link is selected via the keyboard and is ready to be activated)