d is mostly designed for quick and dirty use. There are a few customization
options, but if you find yourself wanting more you probably need a different
tool.
d tries to intelligently guess your project's title. You can override it by
creating a title file with the title inside.
d takes page titles from the first line of the file, which should be a level
1 Markdown heading.
The URL for each page will be the filename of the page, without an extension.
For example, usage.markdown will have a URL of /usage/.
There is one exception: if a filename starts with a number and a dash, d will
ignore those for the URLs (but will sort on them, so you can use this to reorder
pages).
The contents of the footer are rendered from footer.markdown, or left blank if
you don't have it.