diff --git a/003/codex-003.tex b/003/codex-003.tex
index b89b1b6..33b41b1 100644
--- a/003/codex-003.tex
+++ b/003/codex-003.tex
@@ -311,7 +311,7 @@ And it also has what I believe is chord notation (although I could be—and prob
 
 I didn't create that. (I don't even know what it means.) I just copied it verbatim from the \texttt{harmony} guide. In reality, it looks like this:
 
-\begin{Verbatim}[frame=lines, numbers=left, framesep=3mm, label=Harmony example]
+\begin{Verbatim}[frame=lines, numbers=left, xleftmargin=5mm, framesep=3mm, label=\fbox{Harmony Example}]
 %
 \def\h#1h{\hspace*{#1em}}
 \newcommand{\Str}[2][0.5]{\raise#1ex\hbox to #2em{\hrulefill}}
@@ -328,7 +328,7 @@ What this tells me is that the \texttt{harmony} package is very good at position
 
 And then there is the \texttt{musixtex} package. It makes use of a \texttt{music} environment, with your relevant code (of which there is a lot). I've copied this bit from the \texttt{musixtex} documentation:
 
-\begin{Verbatim}[frame=lines, numbers=left, framesep=3mm, label=Musixtex example]
+\begin{Verbatim}[frame=lines, numbers=left, xleftmargin=5mm, framesep=3mm, label=\fbox{Musixtex Example}]
 \begin{music}
 	\instrumentnumber{1} % a single instrument
 	\setname1{Piano} % whose name is Piano
@@ -374,7 +374,7 @@ The \texttt{songs} package\footnote{Which is available on SourceForge---see my l
 
 This code:
 
-\begin{Verbatim}[frame=lines, numbers=left, framesep=3mm, label=Songs example \#1]
+\begin{Verbatim}[frame=lines, framesep=3mm, label=\fbox{Songs Example \#1}]
 \gtab{A}{X02220:001230}
 \end{Verbatim}
 
@@ -384,7 +384,7 @@ This code:
 
 \noindent{}Like it? Here's another:
 
-\begin{Verbatim}[frame=lines, numbers=left, framesep=3mm, label=Songs example \#2]
+\begin{Verbatim}[frame=lines, framesep=3mm, label=\fbox{Songs Example \#2}]
 \gtab{C#sus4}{4:XX3341} 
 \end{Verbatim}
 
@@ -532,7 +532,7 @@ For best results, stick to the hierarchical structure shown above, as this is al
 
 For example, this code:
 
-\begin{Verbatim}[frame=lines, numbers=left, xleftmargin=5mm, label=Enumerate Example, framesep=3mm]
+\begin{Verbatim}[frame=lines, numbers=left, xleftmargin=5mm, label=\fbox{Enumerate Example}, framesep=3mm]
 \paragraph{The First Punic War}
 \begin{enumerate}[noitemsep]
 \item Carthage and Rome
@@ -578,7 +578,7 @@ Similar to the \texttt{enumerate} environment, the \texttt{itemize} environment
 
 As an example, we'll use the above example, but as a bulleted list:
 
-\begin{Verbatim}[frame=lines, numbers=left, xleftmargin=5mm, label=Itemize Example, framesep=3mm]
+\begin{Verbatim}[frame=lines, numbers=left, xleftmargin=5mm, label=\fbox{Itemize Example}, framesep=3mm]
 \paragraph{The First Punic War}
 \begin{itemize}[noitemsep]
 \item Carthage and Rome
@@ -620,7 +620,7 @@ As an example, we'll use the above example, but as a bulleted list:
 
 \noindent{} You can also replace the bullets with any math symbol available in \LaTeX{} like this:
 
-\begin{Verbatim}[frame=lines, numbers=left, xleftmargin=5mm, label=Bullets Example, framesep=3mm]
+\begin{Verbatim}[frame=lines, numbers=left, xleftmargin=5mm, label=\fbox{Bullets Example}, framesep=3mm]
 \begin{itemize}[noitemsep]
 	\item[$\Box$] First item
 	\item[$\aleph$] Second item
@@ -642,7 +642,7 @@ As an example, we'll use the above example, but as a bulleted list:
 
 There are two types of \textit{entry modes} for math in LaTeX. The first is \textbf{in-line mode}, which begins and ends with a dollar sign, and renders the math in the same line of text as the rest of the paragraph. 
 
-\begin{Verbatim}[frame=lines, label=In-Line Math Example, framesep=3mm]
+\begin{Verbatim}[frame=lines, label=\fbox{In-Line Math Example}, framesep=3mm]
 The Pythagorean Theorem is $x^2 + y^2 = z^2$.
 \end{Verbatim}
 
@@ -654,7 +654,7 @@ This is particularly useful if you want to include Greek characters in your text
 
 Math in \LaTeX{} can also be shown in \textbf{display mode}, which renders the mathematics on a separate line. This entry mode begins with \verb+\[+ and ends with \verb+\]+. If we change our example up above to this:
 
-\begin{Verbatim}[frame=lines, label=Display Mode Math Example, framesep=3mm]
+\begin{Verbatim}[frame=lines, label=\fbox{Display Mode Math Example}, framesep=3mm]
 The Pythagorean Theorem is \[x^2 + y^2 = z^2\]
 \end{Verbatim}
 
@@ -757,6 +757,8 @@ Nemo is actually a fork of Nautilus (version 3.4, I believe) and includes a lot
 
 It turns out that installing Nemo and making it the default file manager is fairly simple. These are the commands you need:
 
+\vspace{-8pt}
+
 \begin{Verbatim}[frame=lines, xleftmargin=5mm, numbers=left, baselinestretch=1.2, breaklines=true]
 sudo apt install nemo -y
 xdg-mime default nemo.desktop inode/directory application/x-gnome-saved-search
@@ -775,6 +777,8 @@ gsettings set org.nemo.desktop show-desktop-icons true
 
 \noindent{}Removal is the opposite of installation:
 
+\vspace{-8pt}
+
 \begin{Verbatim}[frame=lines,xleftmargin=5mm, numbers=left, baselinestretch=1.2, breaklines=true]
 xdg-mime default nautilus.desktop inode/directory application/x-gnome-saved-search
 gsettings set org.gnome.desktop.background show-desktop-icons true