The document provides instructions for customizing the appearance of a Tumblr blog theme. It explains that users can choose from free and paid themes under different categories. Themes can be previewed before installing. Users can personalize installed themes by editing options like the blog title color in the "Edit Appearance" section. An example is provided where the blog title color is changed from teal to red.
A plain old bulleted list can get boring, so use graphics to liven it up. An image that conveys what you’re saying in visual format (like this diagram) can reinforce your ideas in the audience’s mind.