diff --git a/cpdfmanual.tex b/cpdfmanual.tex
index 6714314..f24bc5c 100644
--- a/cpdfmanual.tex
+++ b/cpdfmanual.tex
@@ -2,6 +2,7 @@
 % Anil's changes to output format of -list-annotations
 % The new -open-at-page, -open-at-page-fit options
 % Add -args, clean up -control documentation
+% Explain quadruple backslash on command line leading to single real slash \\\\ -> \\ -> \
 
 \documentclass[a4paper,makeidx]{memoir}
 \usepackage{palatino}