Index: mitkImageMapperGL2D.cpp
===================================================================
--- mitkImageMapperGL2D.cpp	(revision 27708)
+++ mitkImageMapperGL2D.cpp	(working copy)
@@ -237,7 +237,10 @@
 
       // create text
       std::stringstream volumeString; 
-      volumeString << std::fixed << std::setprecision(1) << segmentationVolume;
+      int precision = 1;
+      if (segmentationVolume < 0.1)
+        precision = 4;
+      volumeString << std::fixed << std::setprecision(precision) << segmentationVolume;
 
       std::string unit;
       if (node->GetStringProperty("volume annotation unit", unit))