X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Fvertical_reference.h;h=27c4ca4b7fbd3c828509b0fdc578b285e7846b01;hb=2115170a6f8c3fa0cec8c15fc3f3b81282a6e87f;hp=8f5d89916d55f8aa4c2cae11b7e996c9ac32aafa;hpb=5877be91301e5dd54ca125c0acd7bfb1ecc3dcd6;p=libsub.git

diff --git a/src/vertical_reference.h b/src/vertical_reference.h
index 8f5d899..27c4ca4 100644
--- a/src/vertical_reference.h
+++ b/src/vertical_reference.h
@@ -26,9 +26,15 @@ namespace sub {
 
 enum VerticalReference
 {
+	/** distance is from the top of the screen to the top of the subtitle, positive moves down */
 	TOP_OF_SCREEN,
-	CENTRE_OF_SCREEN,
+	/** distance is from the centre of the screen to the centre of the subtitle, positive moves down */
+	VERTICAL_CENTRE_OF_SCREEN,
+	/** distance is from the bottom of the screen to the bottom of the subtitle, positive moves up */
 	BOTTOM_OF_SCREEN,
+	/** position on screen is not known, so we are referring
+	 *  to the top of the subtitle; positive distances move down from there
+	 */
 	TOP_OF_SUBTITLE
 };