A blog theme is made from a collection of templates that control the look of the blog. You can customize theme templates and save a new theme for a blog.
You must be a blog administrator to manage blog templates.
You can edit the templates that define the layout, colors and fonts
of your blog. Before you can edit the templates for the theme, you must choose
to customize the theme. Customizing theme templates involves editing the source
HTML for the template files. You should only do this if you are comfortable
editing HTML files.
Restriction: Only modification to the HTML
is supported. Do not change any calls that retrieve data from the blog system
or your blog may fail to work.