\begin{alltt}
|-\textbf{doc}\footnote{the \texttt{documentation} folder}
|---i\footnote{input for \texttt{documentation}, divided into \texttt{free} and \texttt{non-free}, divided into \texttt{p}ixel and \texttt{v}ector graphics}
|-----free
|-------p
|-------v
|-----non-free
|-------p
|-------v
|-\textbf{i}\footnote{the \texttt{i}nput folder}
|---cols+rows
|-----A3
|-------11x25
|-------13x30
|-------15x13
|-------16x14
|-------16x35
|-------17x15
|-------18x16
|-------20x17
|-------21x18
|-------22x19
|-------23x20
|-------25x22
|-------8x18
|-----mini
|-------3x1
|-----multipage
|-------13x160
|-------16x260
|-------18x650
|-------20x260
|-------20x650
|-------8x200
|---free
|-----typo
|---non-free
|-----typo
|-\textbf{o}\footnote{the \texttt{o}utput folder}
|---free
|-----A3
|-----multipage
|---non-free
|-----A3
|-----A3_Stadtgarten
|-\textbf{src}
\end{alltt}\footnote{the \texttt{source} folder, for software that needs to be compiled.}