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-rw-r--r--DOCS/tech/slave.txt5
1 files changed, 4 insertions, 1 deletions
diff --git a/DOCS/tech/slave.txt b/DOCS/tech/slave.txt
index 8dd975a0dc..96fa4ec1fe 100644
--- a/DOCS/tech/slave.txt
+++ b/DOCS/tech/slave.txt
@@ -29,8 +29,11 @@ alt_src_step <value> (ASX playlist only)
audio_delay <value>
Adjust the audio delay by <value> seconds.
-[brightness|contrast|gamma|hue|saturation] <-100 - 100> [<abs>]
+[brightness|contrast|gamma|hue|saturation] <value> [<abs>]
Set/adjust video parameters.
+ If abs is not given or zero, modifies parameter by <value>.
+ If abs is non-zero, parameter is set to <value>
+ <value> is in the range [-100, 100]
change_rectangle <val1> <val2>
Change the position of the rectangle filter rectangle.