Guide to LaTeX (4th Edition) (Tools and Techniques

342 Chapter 15. Presentation Material
\urlid{url}
to set the web address (URL) of the home page button in the
navigation panel;
\screensize{height}{width}
to set the dimensions of the screen; since there are no defaults,
this must be given;
\margins{left}{right}{top}{bottom}
to set the margins for the document; again there are no defaults,
so this must be given.
The navigation panel
The navigation panel appears on each page and contains the buttons for
changing pages and linking to the author’s home page. A default panel is
provided, but the user may redesign it as he or she pleases, by redefining
the \panel command. For example,
\renewcommand{\panel}{\colorbox{panelbackground}
{\begin{minipage}[t][\paperheight][b]{\panelwidth}
. . . . .
\Acrobatmenu{FirstPage}
{\addButton{.2in}{$\blacktriangleleft$}}
. . . . .
\end{minipage}}}
Here the \Acrobatmenu command is from the hyperref package (see
page 247) while \panelwidth and \addButton are from pdfscreen. The
\panelwidth length is by default 15% of the screen width, and can be
redefined. The \addButton{wth}{text} creates a button of width wth
containing text. In the above example, clicking the button executes the
viewer command to go to the first page.
There is also a command
\imageButton{wth}{ht}{image}
to insert the graphics file image as a button of width wth and height ht.
A row of small navigation buttons can be turned on at the bottom of
the page with \bottombuttons and turned off with \nobottombuttons.
Background image
A graphics file can be inserted as background for the whole page with
\overlay{image}, or a uniform background color can be selected with
\backgroundcolor{color}.
The navigation panel has as background that color previously defined
as panelbackground, which the user may alter. Otherwise, the graphics