-
-Grob extents may be hard coded using grob properties. This
-requires Grob::preset_extent () function.
-
-The lyrics in this example have extent (-10,10) which is why they are
-spaced so widely.
+The object may be extended to larger sized by overriding their properties.
+The lyrics in this example have an extent of @code{(-10,10)}, which is why
+they are spaced so widely.