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A theme is a RapidWeaver add-on with many layout and color options that let you change the look of your site with the click of a button.

A stack is a layout component for the popular RapidWeaver plugin, Stacks, YourHead Software's page layout tool.

RapidWeaver snippets are bits of useful text or code that can be stored in RapidWeaver's snippet panel and used again and again.