This can't be done with CSS - to do this you need to have a cutom layer or theme.

You need to change the lang_posted_by_date_and_time function, which is:
function lang_posted_by_date_and_time(EntryLite e, bool showposter, bool showdate, bool showtime) : string ( Read more... )

Some layouts (such as Hills) have a little picture next to the entry title. This can be changed with:

.asset-stream .asset-header {
background: transparent url(post-ornament.gif) no-repeat scroll 0 0;
}

Replace post-ornament.gif with the address of your own image (remember to include http://) and put this in the Custom CSS area ( Read more... )

The background of the page as a whole (i.e. under the central content strip) can be changed using the body tag:
body ( Read more... )

I'm feeling quite pleased with myself.

I've been delving into the mysteries of S2 and have been working out how to add custom HTML to a layout sidebar. The first fruits of my endeavours are now online, and I've add one of Flagrant Disregard's Flickr badges.

( Here's how I put it all together... )

I figured a good number of people will want to replace their header images on this layout. It's very simple, but you will need the image hosted somewhere, like Photobucket or LJ's Scrapbook feature. The original header image for each theme is a different size, though each are approximatly 1000x200px.

In the "Custom CSS" box, put this:

#header- ( Read more... )