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-rw-r--r--doc/filters.texi10
1 files changed, 10 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi
index d95b377bd7..f267d26b9d 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -20018,6 +20018,16 @@ default is @code{p}.
@item ds
Set display scale, can be linear: @code{lin} or log: @code{log},
default is @code{lin}.
+
+@item dm
+In second.
+If set to > 0., display a line for the max level
+in the previous seconds.
+default is disabled: @code{0.}
+
+@item dmc
+The color of the max line. Use when @code{dm} option is set to > 0.
+default is: @code{orange}
@end table
@section showwaves