* when exporting an alignment as a figure (setting FIGURE_AUTOIDWIDTH to true
* will override this).</li>
* <li>STRUCT_FROM_PDB (false) derive secondary structure annotation from PDB
* when exporting an alignment as a figure (setting FIGURE_AUTOIDWIDTH to true
* will override this).</li>
* <li>STRUCT_FROM_PDB (false) derive secondary structure annotation from PDB