The navigation features of these webpages are summarized in the following table, including the keyboard shortcuts for each button.
| Button | Key | Action |
| ▸and▾ | d | Toggle the display of the lower-level sections this section contains. The “d” key toggles the currently selected section. |
| Text only | t | Expand width of the text to be the full width of the browser. Toggles back to the table of contents when the text is expanded. |
| 1 2 3 ... | 1, 2, 3, ... | Open the table of contents to this depth. |
| Next | n | Select the next section that follows the last highlighted section in the table of contents. |
| Previous | p | Select the previous section before the bottom-most highlighted section in the table of contents. |
| Resize | r | Resize the table of contents pane so that all entries fit in the pane. |
| Focus | f | Focus the table of contents on the currently selected section (outlined in the table of contents). |
| Links in boxes Links in color |
l | Toggles between displaying links in shaded boxes (for visibility) or as colored text (for ease of reading). This button is not displayed for pages without links. |
| Search | s | Toggle between the last page of search results and the current page. Entering text in the search window and pressing the “enter” (or “return”) key produces a page of search results. |
| Clear | c | Clear the yellow highlighting of search results. |
| Help | h | Toggle this “help” page. |
These web page navigation features are described in more detail in the following sections.
The left panel is a dynamic table of contents. Clicking on a section title displays that section in the panel on the right. Clicking on a triangle that points to the right ( ▸ ) opens a list of subsections. Clicking on a triangle that points down ( ▾ ) closes the list of subsections.
Clicking on a section title while holding down a modifier key will both display that section in the right panel as well as open all of that section's subsections in the left panel. The modifier key is the control key if the browser does not define an action for control-click. For other browsers the modifier key will either be the Mac OS “command” key or the “Windows” key.
The section headings in the table of contents are highlighted for the section that are visible in the content pane on the right. For subsections, the enclosing parent sections are also highlighted to provide further information about the relationship of sections and subsections.
The triangle icons in the table of contents toggle the display of the sections contained by that section. The “d” key will toggle the display of the currently selected section, similar to the action performed by clicking on a triangle.
The “Text only” button expands the width of the text to the full width of the browser. The button then changes to “Table of contents” and restores the table of contents display when clicked.
The numbered buttons display the table of contents expanded to that depth. Clicking on “1” will show only the top-level sections; clicking on “2” will also display the next level; and so forth. Based on how many sections are open, a button could also close the contents of sections. For example, alternating between the “1” and the largest number can provide the highest- and lowest level view of document's structure.
The “Next” and “Previous” buttons will select the next or last section based on the currently selected section. This will affect only the visible sections titles, that is, the section titles that are highlighted in the table of contents. Because the selection is dependent on how much of the table is contents, these buttons can used to quickly skim through the top-level sections or, by opening more of the table of contents using one of the higher-number buttons, to review the contents to a greater level of detail.
The “Focus” button closes all the table of contents entries except for those necessary to show the most recently selected entry. This selected entry is surrounded by a darker border; the URL in the browser's address bar is the address of that section. “Focus” is also useful after a search displays a section of text that is not currently visible in the table of contents, or when using the browser history's “back” and “forward” buttons.
The “Resize” button will modify the width of the table of contents pane so that all section titles are visible but fit within the pane without extra horizontal space.
By default, links are only displayed with blue text for ease of reading. The “Show links” button surrounds all links with a blue box so that all links are readily visible when skimming a page. This button is not displayed for pages that do not contain links; the presence or absence of this button is also an indication of the existence of links on a given page.
To search for the occurrences of a text string in this document, enter text in the upper right box and press the “enter” key. The search text in context will be displayed in the order in which it was found in all pages. Click on the text box to go to that page. The section headings in the search results are also links to their respective pages. When viewing a page, clicking on the “Search” button will return to the last set of search results. Clicking again will return to the previously viewed page.
When the search results are displayed, the search text is highlighted in yellow. The “Clear” button removes the highlighting. The previous search results can still be displayed with the “Search” button.
The “Help” button displays this page. When the page is displayed, the button changes to “Back” and will restore the previous page.