I am reading a book whose table of contents has something like this:


2.2 Title of the Subsection

2.3 Title of the Subsection

2.3.A Title of the Subsection

2.4 Title of the Subsection


How can I achieve exactly that? Please note that 2.3.A is also a subsection, not a subsubsection belonging to 2.3.

Thanks in advance!

  • 1
    Welcome to TeX.SE! Can you please explain why you need this? This is very unusual! Do you need this numbering only one time or more?
    – Mensch
    Aug 15, 2019 at 4:39
  • I want to write a pdf file summarizing what each subsection of the book says. So I hope my numbering could be exactly like the book. And I'd say only one time if that's easier to achieve.
    – trisct
    Aug 15, 2019 at 4:58
  • 1
    Basically a duplicate of New level of section, interaction with hyperref
    – Alan Munn
    Aug 15, 2019 at 5:00
  • Please tell us which document class you employ.
    – Mico
    Aug 15, 2019 at 5:29
  • 1
    @Mico I am using article.
    – trisct
    Aug 15, 2019 at 5:35

1 Answer 1


I suggest you do the following:

  • In the preamble, issue the intstruction


    This instruction "saves" the default format of the subsection counter's representation

  • Just before the start of subsection 2.3A, issue the following instructions:

    \renewcommand\thesubsection{\origthesubsection A}
  • Just before the start of the next, "standard-numbered" subsection, issue the instruction


This approach works with the hyperref and cleveref packages, and it also lets you create a table of contents via the \tableofcontents instruction.

enter image description here






\renewcommand\thesubsection{\origthesubsection A}
\subsection{DDD} \label{sec:ddd}

\subsection{EEE} \label{sec:eee}
\subsection{FFF} \label{sec:fff}

\ref{sec:ddd}, \ref{sec:fff}

\autoref{sec:ddd}, \autoref{sec:fff}

\cref{sec:ddd}, \cref{sec:fff}

  • Thanks very much! It works well and is exactly what I want.
    – trisct
    Aug 15, 2019 at 7:27

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