Index: idl/GNOME_Magnifier.idl
===================================================================
RCS file: /cvs/gnome/gnome-mag/idl/GNOME_Magnifier.idl,v
retrieving revision 1.11
diff -u -p -r1.11 GNOME_Magnifier.idl
--- idl/GNOME_Magnifier.idl	24 Jul 2006 23:12:38 -0000	1.11
+++ idl/GNOME_Magnifier.idl	14 Dec 2006 12:40:58 -0000
@@ -126,6 +126,12 @@ module GNOME {
 
     /**
      * Set the zoom region image contrast.
+     * Set the contrast applied to each image component (red, green and blue).
+     * The input for each component must be in the range -1 and 1, otherwise
+     * they will be clamped to this interval. The value -1 means reduce 100%
+     * the contrast, resulting in a gray image. The value 1 means increase 100%
+     * the contrast, resulting in the R, G and B values being black or white.
+     * The value 0 means no change in contrast.
      * @param R the amount of red in the contrasted image.
      * @param G the amount of green in the contrasted image.
      * @param B the amount of green in the contrasted image.
@@ -134,6 +140,7 @@ module GNOME {
 
     /**
      * Get the zoom region image contrast.
+     * Get the contrast applied to each image component (red, green and blue).
      * @param R the amount of red in the contrasted image.
      * @param G the amount of green in the contrasted image.
      * @param B the amount of green in the contrasted image.
