X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fviewmodel%2FViewportRanges.java;h=104fb62be1541ddf9b41c35486a1311378d67628;hb=17b7d054cf7faa5ee57ad8c8c4c9daa495d8cb35;hp=4f671da9ce899376397a2486c789ecd7aef84d1e;hpb=c0b77a767e71bffd8f55704f9a64f943f559e4f6;p=jalview.git

diff --git a/src/jalview/viewmodel/ViewportRanges.java b/src/jalview/viewmodel/ViewportRanges.java
index 4f671da..104fb62 100644
--- a/src/jalview/viewmodel/ViewportRanges.java
+++ b/src/jalview/viewmodel/ViewportRanges.java
@@ -585,8 +585,8 @@ public class ViewportRanges extends ViewportProperties
     }
 
     int residuesToScroll = width * widthsToScroll;
-    int newStartRes = up ? oldStartRes - residuesToScroll : oldStartRes
-            + residuesToScroll;
+    int newStartRes = up ? oldStartRes - residuesToScroll
+            : oldStartRes + residuesToScroll;
     if (newStartRes < 0)
     {
       newStartRes = 0;
@@ -612,7 +612,7 @@ public class ViewportRanges extends ViewportProperties
     {
       scrollUp(false);
     }
-    
+
     HiddenColumns hidden = al.getHiddenColumns();
     while (x < hidden.visibleToAbsoluteColumn(startRes))
     {