line_max 100
headings_flag 1
heading_prefix "  \\bigletter "

preamble "\\begin{sphinxtheindex}
\\def\\bigletter#1{{\\Large\\sffamily#1}\\nopagebreak\\vspace{1mm}}

"

postamble "\n\n\\end{sphinxtheindex}\n"

symhead_positive "{Symbols}"
numhead_positive "{Numbers}"