diff --git a/config/config.tex b/config/config.tex
index 72fa945..5ef679e 100644
--- a/config/config.tex
+++ b/config/config.tex
@@ -23,6 +23,9 @@
 % Configure definition, lemma, theorem, etc numbering behaviour. 1 = Individual, 2 = Combined (apart from Definition), 3 = Combined
 \setcounter{numberingConfig}{1}
 
+% Configure if for definitions, lemmas, etc, numbering should be (0) = <section>.<number> or (1) = <section>.<subsection>.<number> or (2) = <section>.<subsection>.<subsubsection>.<number>
+\setcounter{numberSubsections}{0}
+
 % Set the default language. 
 \setLang{en}
 
diff --git a/docs/docs.pdf b/docs/docs.pdf
index 0e338b5..fdd6be3 100644
Binary files a/docs/docs.pdf and b/docs/docs.pdf differ
diff --git a/docs/parts/reference.tex b/docs/parts/reference.tex
index 54e8373..89efa7c 100644
--- a/docs/parts/reference.tex
+++ b/docs/parts/reference.tex
@@ -9,6 +9,7 @@
 \end{itemize}
 
 \subsection{Per-File config}
+\label{sec:perFileConf}
 \begin{itemize}
     \item \verb|\renewcommand{\authorTitle}|\{\textit{string}\} Change the author (in the title) for this document only
     \item \verb|\renewcommand{\authorHeaders}|\{\textit{string}\} Change the author (in the header) for this document only
@@ -17,6 +18,7 @@
     \item \verb|\renewcommand{\city}|\{\textit{string}\} Change the city (for letters) for this document only
     \item \verb|\renewcommand{\countrycode}|\{\textit{string}\} Change the country-code (for letters) for this document only
     \item \verb|\setcounter{numberingConfig}|\{\textit{number}\} Change the numbering of definitions, lemmas, etc for this document. 1 = Separately, 2 = Combined (except for definition), 3 = Combined, 4 = Off
+    \item \verb|\setcounter{numberSubsections}|\{\textit{number}\} Change the format of the numbering of definition, lemma, etc. 0 = $<$section$>$.$<$number$>$,\\1 = $<$section$>$.$<$subsection$>$.$<$number$>$,\\ 2 = $<$section$>$.$<$subsection$>$.$<$subsubsection$>$.$<$number$>$
     \item \verb|\setcounter{descriptorShadeStrength}|\{\textit{number}\} Change the colour saturation of the inline descriptors
     \item \verb|\setcounter{shadeStrength}|\{\textit{number}\} Change the colour saturation of the \verb|\shade| command
     \item \verb|\setLang|\{\textit{language}\} Change the language. Will automatically load babel in German. Can only be used once and only at the start of the document or in the preamble, as repeated usage leads to undefined behaviour
@@ -141,10 +143,9 @@ Put \verb|\usetcolorboxes| right after \verb|\startDocument| (right after \verb|
 \newpage
 \fhlc{Aquamarine}{Counter-enabled}
 
-These ones also have a setting, namely, you can change the counter behaviour:\\
-\verb|\setcounter{numberingConfig}|\{\textit{number}\}: Change the numbering of definitions, lemmas, etc for this document. 1 = Separately, 2 = Combined (except for definition), 3 = Combined, 4 = Off
+These ones also have two settings, namely, you can change the counter behaviour and the inclusion of subsections in the numbering. See \ref{sec:perFileConf}.
 
-Here, it is shown with the default setting, $1$, meaning they are numbered separately. See \ref{sec:counters} for a guide on how to change the current number.
+See \ref{sec:counters} for a guide on how to change the current number.
 
 \begin{definition}[]{Title here}
     \begin{minted}{latex}
diff --git a/main/core.tex b/main/core.tex
index 9e00896..e5eebf2 100644
--- a/main/core.tex
+++ b/main/core.tex
@@ -71,6 +71,7 @@
 
 % Create config counters / variables. See the config file for changing them
 \newcounter{numberingConfig}
+\newcounter{numberSubsections}
 \newcounter{descriptorShadeStrength}
 \newcounter{shadeStrength}
 
diff --git a/main/style/counters.tex b/main/style/counters.tex
index 9104432..439b0b9 100644
--- a/main/style/counters.tex
+++ b/main/style/counters.tex
@@ -14,7 +14,9 @@
 \newcounter{examples}
 \newcounter{all}
 
-\newcommand{\usenumberArabic}[1]{\ifnum\value{numberingConfig}<4{\arabic{section}.\ifnum\value{numberingConfig}<3{\ifnum\value{numberingConfig}<2{\arabic{#1}\stepcounter{#1}}\else{
+\newcommand{\useSubsection}{\ifnum\value{numberSubsections}>0{\arabic{subsection}.}\else{}\fi}
+\newcommand{\useSubsubsection}{\ifnum\value{numberSubsections}>1{\arabic{subsubsection}.}\else{}\fi}
+\newcommand{\usenumberArabic}[1]{\ifnum\value{numberingConfig}<4{\arabic{section}.\useSubsection\useSubsubsection\ifnum\value{numberingConfig}<3{\ifnum\value{numberingConfig}<2{\arabic{#1}\stepcounter{#1}}\else{
 \ifx#1definitions
     \arabic{#1}\stepcounter{#1}
 \else