diff --git a/book/preamble.tex b/book/preamble.tex
index 4a8f755..64abb14 100644
--- a/book/preamble.tex
+++ b/book/preamble.tex
@@ -54,28 +54,24 @@
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 % for one-sided on left margin
-\usepackage{lineno}
-\linenumbers
+%\usepackage{lineno}
+%\linenumbers
 
 % for two-sided on inside margin
 %\usepackage[switch*,pagewise]{lineno}
 %\linenumbers
 %\runningpagewiselinenumbers
 
-%\renewcommand\linenumberfont{\normalfont\small\sffamily}
-%\renewcommand\linenumberfont{\normalfont\footnotesize\sffamily}
-%\renewcommand\linenumberfont{\normalfont\scriptsize\sffamily}
-%\renewcommand\linenumberfont{\normalfont\tiny\sffamily\color{red}}
-\renewcommand\linenumberfont{\normalfont\tiny\sffamily\bfseries\color{violet}}
+%\renewcommand\linenumberfont{\normalfont\tiny\sffamily\bfseries\color{violet}}
 
 % lineno is screwy for displayed equations
-\let\oldequation\equation
-\let\oldendequation\endequation
-\renewenvironment{equation}
-  {\linenomathNonumbers\oldequation}
-  {\oldendequation\endlinenomath}
-
-\setlength\linenumbersep{6mm}
+%\let\oldequation\equation
+%\let\oldendequation\endequation
+%\renewenvironment{equation}
+%  {\linenomathNonumbers\oldequation}
+%  {\oldendequation\endlinenomath}
+%
+%\setlength\linenumbersep{6mm}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%