If you want to modify your (Blogger) blog and use a dynamic theme, please consider visiting Southern Speakers. Their css code suggestions ALL work and enable bloggers to change their blog pages' appearance in a subtle or radical way. I've explored the web for a long time in search of adequate tips on this matter, but never came across a better source.
|Southern Speakers header image|
The CommuniCats blog uses their css code to center the Header and Tab Bar, Make the Tab Bar sticky and to continuously show the gadgets to the right. As you can see, all of the code simply works. Just cut and paste into the Template - Customize - Advanced - CSS and you're done.