diff --git a/beamercolorthememetropolis.dtx b/beamercolorthememetropolis.dtx
index 44b7db6..4f0eaad 100644
--- a/beamercolorthememetropolis.dtx
+++ b/beamercolorthememetropolis.dtx
@@ -27,7 +27,7 @@
 % \iffalse
 %<*package>
 % ------------------------------------------------------------------------- \fi
-%
+% \section{Implementation: \textsc{metropolis} color theme}
 % Options
 %
 %    \begin{macrocode}
diff --git a/beamerfontthememetropolis.dtx b/beamerfontthememetropolis.dtx
index 7a1decf..d29e557 100644
--- a/beamerfontthememetropolis.dtx
+++ b/beamerfontthememetropolis.dtx
@@ -27,7 +27,7 @@
 % \iffalse
 %<*package>
 % ------------------------------------------------------------------------- \fi
-%
+% \section{Implementation: Fira font theme}
 % Font Definitions
 %
 %    \begin{macrocode}
diff --git a/demo.pdf b/demo.pdf
index 5fa3491..897f77a 100644
Binary files a/demo.pdf and b/demo.pdf differ
diff --git a/demo.tex b/demo.tex
index c63f311..4505302 100644
--- a/demo.tex
+++ b/demo.tex
@@ -1,6 +1,6 @@
 \documentclass[10pt]{beamer}
 
-\usetheme{m}
+\usetheme[usetitleprogressbar]{m}
 \renewcommand{\mthemetitleformat}{\scshape\MakeLowercase}
 
 \usepackage{booktabs}
diff --git a/mtheme.dtx b/mtheme.dtx
index 01ea49c..71a721a 100644
--- a/mtheme.dtx
+++ b/mtheme.dtx
@@ -13,6 +13,7 @@
 \documentclass{ltxdoc}
 %\OnlyDescription
 
+\usepackage[parfill]{parskip}
 \usepackage{setspace}
 \onehalfspacing
 
diff --git a/mtheme.pdf b/mtheme.pdf
index 90be96d..768dfb6 100644
Binary files a/mtheme.pdf and b/mtheme.pdf differ
diff --git a/pgfplotsthemetol.dtx b/pgfplotsthemetol.dtx
index 1f83732..d543a82 100644
--- a/pgfplotsthemetol.dtx
+++ b/pgfplotsthemetol.dtx
@@ -30,7 +30,7 @@
 %<*package>
 % ------------------------------------------------------------------------- \fi
 %
-% \subsection{\texttt{pgfplotsthemetol}}
+% \section{Implementation: Tol \texttt{pgfplots} theme}
 %
 % Paul Tol's 12-color palette\footnote{Tol actually describes several
 % palettes; these colours are taken from the bottom row of Figure 3 in his