direction..}, direction of axis tics} -->
Direction of axis tics, 1 for inside or 0 for outside.
<p>
<li> `<font color="#82140F"><code>..tic_size..</code></font>'
<!-- latex: \index{@code{..tic_size..}, size/cm of axis tics} -->
Size of axis tics in centimetres.
<p>
<li> `<font color="#82140F"><code>..trace..</code></font>'
<!-- latex: \index{@code{..trace..}, for tracing program execution} -->
Equal to 1 if the `<font color="#82140F"><code>-trace</code></font>' command-line flag was set.  Used for
tracing 