First Heading
Second Heading
Third Heading
Fourth Heading
[output] \heading[][]
\h2(#S1)[First Heading]
\h3[Second Heading]
\h4[Third Heading]
\h5[Fourth Heading]
\signature
[output] \heading[][]
\h2(#S1)[First Heading]
\h3[Second Heading]
\h4[Third Heading]
\h5[Fourth Heading]
\signature