 centimetres, or a negative number giving the negative of the
ratio of arrowhead halfwidth to arrow length (see <a href="Set.html#SetArrowSize">Set Arrow Size</a>).
<p>
<li> `<font color="#82140F"><code>..batch..</code></font>'
<!-- latex: \index{@code{..batch..}, flag used for batch mode} -->
Flag used for batch mode.
<p>
<li> `<font color="#82140F"><code>..debug..</code></font>'
<!-- latex: \index{@code{..debug..}, flag used for debugging} -->
Equal to 1 if the `<font color="#82140F"><code>-debug</code></