The HTML Help Toolbar contains the following icons,
when you view the PHP Manual:
Hide/Show - Hides/shows the navigation pane.
Locate - Locates a topic in the contents tab (in
case you reached a topic with search, index or
favorites, and would like to see where it is
in the table of contents tree view).
Back - Goes back in the history.
Forward - Goes forward in the history.
Refresh - Reloads the current page.
Home - Opens the startup page of the CHM.
Print - Opens the print dialog box.
Options - Provides a dropdown with more options.
Using this toolbar is really easy, many of the toolbar
icons are strongly related to their Internet Explorer
equivalents.