diff --git a/src/lib/evas/Evas_Legacy.h b/src/lib/evas/Evas_Legacy.h
index cc61fbddb7..7f2b3a5b99 100644
--- a/src/lib/evas/Evas_Legacy.h
+++ b/src/lib/evas/Evas_Legacy.h
@@ -2682,6 +2682,12 @@ EAPI void evas_object_image_mmap_get(const Eo *obj, const Eina_File **f, const c
  * You can specify some flags when saving the image.  Currently
  * acceptable flags are @c quality and @c compress. Eg.: @c
  * "quality=100 compress=9"
+ * 
+ * quality is hint for the quality of image,0-100. 0 means low quality 
+ * and saved image size is small. 100 means high quality and saved image size is big.
+ *
+ * compress is hint for the compression modes (Eet ones) or for the compression flags (Png one) 
+ * (1 == compress, 0 = don't compress).
  *
  * @param[in] file The filename to be used to save the image (extension
 obligatory).