default value if you don't specify this options is usually 72 <abbr>dpi</abbr>.</p></dd>

<dt>-dTextAlphaBits=<em>n</em></dt>
<dt>-dGraphicsAlphaBits=<em>n</em></dt>
<dd><p>These options control the use of subsample antialiasing. Their use is highly recommended
for producing high quality rasterizations of the input files. The size of the subsampling
box <em>n</em> should be 4 for optimum output, but smaller values can be used for faster
rendering. Antialiasing is enabled separately for text and graphics con