X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fviewmodel%2FOverviewDimensions.java;h=8dc7dd86aa0c8b15d1a920c1b17721a75ea73b4e;hb=45b405507491a3d15d2b6b2c4f115a840945b28f;hp=3ac236d17a75b6957d81026463081b5c8cbc84c1;hpb=04e88679fd837e9fe36d186e5eacdd5f13a89927;p=jalview.git

diff --git a/src/jalview/viewmodel/OverviewDimensions.java b/src/jalview/viewmodel/OverviewDimensions.java
index 3ac236d..8dc7dd8 100644
--- a/src/jalview/viewmodel/OverviewDimensions.java
+++ b/src/jalview/viewmodel/OverviewDimensions.java
@@ -304,10 +304,10 @@ public abstract class OverviewDimensions
     boxY = Math.round(vpbox.y / heightRatio);
 
     // boxWidth is the width in residues translated to pixels
-    boxWidth = Math.round(vpbox.width / widthRatio);
+    boxWidth = Math.max(1, Math.round(vpbox.width / widthRatio));
 
     // boxHeight is the height in sequences translated to pixels
-    boxHeight = Math.round(vpbox.height / heightRatio);
+    boxHeight = Math.max(1, Math.round(vpbox.height / heightRatio));
   }
 
   /**