+Every piece of LilyPond input needs to have @{curly braces@} placed
+around the input. For the rest of this manual, most examples will
+omit these braces, but don't forget them in your own music!
+
+In addition, many examples use @code{relative} mode. This is explained
+in @ref{Octave entry}; for now simply be aware that some examples
+should be placed inside @code{\relative @{ @emph{...music...} @}}.
+Many example have also been compressed horizontally to save
+space, using @code{\paper @{ ragged-right = ##t @}}.
+
+@cindex Case sensitive
+Finally, LilyPond input is case sensitive. @code{ @{ c d e @} } is
+valid input; @code{ @{ C D E @} } will produce an error message.
+