Draw a box with rounded corners around @var{arg}. Looks at @code{thickness},
@code{box-padding} and @code{font-size} properties to determine line
thickness and padding around the markup; the @code{corner-radius} property
-makes possible to define another shape for the corners (default is 1)."
+makes possible to define another shape for the corners (default is 1).
+
+@lilypond[quote,verbatim,fragment,relative=2]
+c^\\markup{ \\rounded-box Overtura }
+c,8. c16 c4 r
+@end lilypond"
(let* ((th (*
(ly:output-def-lookup layout 'line-thickness)
(chain-assoc-get 'thickness props 1)))