--- a/src/viewer_swing/java/com/glavsoft/viewer/Viewer.java	Wed Jun 22 19:11:37 2016 +0900
+++ b/src/viewer_swing/java/com/glavsoft/viewer/Viewer.java	Wed Jun 22 19:52:32 2016 +0900
@@ -507,8 +507,8 @@
         int screenNumber = 0;
         for (Rectangle rect : rectangles) {
             int scale = retinaScale(screenNumber);
-            int x = rect.x < 0 ? rect.x * scale : rect.x;
-            int y = rect.y < 0 ? rect.y * scale : rect.y;
+            int x = rect.x == -rect.width  ? rect.x * scale : rect.x;
+            int y = rect.y == -rect.height ? rect.y * scale : rect.y;
             if (x < offsetx) offsetx = x;
             if (y < offsety) offsety = y;
             screenNumber++;