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-rw-r--r--doc/filters.texi6
1 files changed, 6 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi
index 7b9d665aea..fc7cdebb7a 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -9891,6 +9891,12 @@ mono output (left eye only)
@item mr
mono output (right eye only)
+
+@item chl
+checkerboard, left eye first
+
+@item chr
+checkerboard, right eye first
@end table
Default value is @samp{arcd}.