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To find what things you can style, look through the theme stylesheet. You'll be able to find plenty of examples of things you can change. However, keep in mind that more styling doesn't equal better styling. First and foremost should be ease of reading – appearance and cosmetics are secondary.
Example
| Note |
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| This is an example of how to use the CSS editor, not how to style a blockquote well. While the contrast is okay and the font is easy to read, it would be a jarring transition from the usual style. |
If we insert the following CSS:
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