### 11.4. `\subsubsection`

We use a negative length for the fifth (after-skip) argument, which forces a run-in heading; the absolute value of this argument is used as a space between the heading and the first word of the paragraph.

nmtthesis2015.sty
```%
% - - -   \ s u b s u b s e c t i o n
%
\renewcommand{\subsubsection}%
{%
\@startsection{subsubsection}{3}{\z@}%
{\pre@sectionskip}%
{-1em}%
{\normalsize\bfseries}%
}% End \subsubsection
```