The bottom of each page has navigational links for the previous page, next page, top page, and chapter index (where applicable). You can also change the body text font by clicking on a font name.
Furthermore, you can:
click the left edge for the previous page.
click the right edge for the next page.
Roll over the page edges to see these clickable areas.
Use the font picker at the bottom of the page to change the font used for body text. The font picker can be detached and moved around the page.
Cross-references, denoted with small caps, are clickable. This is in homage to reference works like Garner’s Modern English Usage (see bibilography), which commonly format cross-references in the same style. If you own one of these books, you’re familiar. If you don’t, buy one.
Links to outside material are denoted with a red circle, like so. For three reasons:
To distinguish them visually from internal cross-references—a small signal that “hey, you’re now leaving the book.” (Occasionally I bend this rule, but don’t panic.)
Yes, I’m aware that web hyperlinks have typically been underlined. But underlining is nothing more than an odious typewriter habit, held over on websites because of inertia. It was tolerable in 1994 when web browsers could do so little. But not today, when they can do so much.
Vigorously styled hyperlinks on a page tend to move to the foreground of a reader’s attention, like an HDTV in a hotel bar. (See also maxims of page layout.) The red circle is meant to be noticeable while you’re reading the sentence that contains the link. Otherwise it disappears, so as not to distract.
Of course, the main reason hyperlinks have historically been overstyled is because generating clicks on those links is essential to internet advertising. Here, you will find no advertising—just us readers. The design is tailored accordingly.