FAQ - Style selection
From Dreamwidth Notes
How do I choose a style for my journal?
You can choose your journal style at the Select Journal Style page. You can reach this from the Select style link in the Organize menu on Dreamwidth site pages.
The Select Journal Style page shows a grid containing thumbnail previews of the available styles. The magnifying glass Preview link expands each thumbnail to a full-sized preview of what your journal will look like with that style. Use the Apply theme button below the style you prefer to select it for your journal.