diff --git a/hurricane/src/hurricane/DbU.cpp b/hurricane/src/hurricane/DbU.cpp
index f941a1bc..de300d8d 100644
--- a/hurricane/src/hurricane/DbU.cpp
+++ b/hurricane/src/hurricane/DbU.cpp
@@ -256,23 +256,25 @@ namespace Hurricane {
   string  DbU::getValueString ( DbU::Unit u, int mode )
   {
     char buffer[1024];
-    char unitSymbol = 'u';
+    char unitPower = 'u';
+    char unitSymbol   = '\0';
 
     if ( _stringMode == Grid ) {
-      unitSymbol = 'g';
+      unitPower = 'g';
       snprintf ( buffer, 1024, "%.1f", getGrid(u) );
     } else if ( _stringMode == Symbolic ) {
-      unitSymbol = 'l';
+      unitPower = 'l';
       snprintf ( buffer, 1024, "%.1f", getLambda(u) );
     } else if ( _stringMode == Physical ) {
+      unitSymbol = 'm';
       switch ( _stringModeUnitPower ) {
-        case Pico:  unitSymbol = 'p'; break;
-        case Nano:  unitSymbol = 'n'; break;
-        case Micro: unitSymbol = 'u'; break;
-        case Milli: unitSymbol = 'm'; break;
-        case Unity: unitSymbol = 'U'; break;
-        case Kilo:  unitSymbol = 'k'; break;
-        default:    unitSymbol = '?'; break;
+        case Pico:  unitPower = 'p'; break;
+        case Nano:  unitPower = 'n'; break;
+        case Micro: unitPower = 'u'; break;
+        case Milli: unitPower = 'm'; break;
+        case Unity: unitPower = 'U'; break;
+        case Kilo:  unitPower = 'k'; break;
+        default:    unitPower = '?'; break;
       }
       snprintf ( buffer, 1024, "%.3f", getPhysical(u,_stringModeUnitPower) );
     } else {
@@ -289,7 +291,8 @@ namespace Hurricane {
         if ( buffer[length] != '0' ) break;
       }
     }
-    buffer[++length] = unitSymbol;
+    buffer[++length] = unitPower;
+    if ( unitSymbol ) buffer[++length] = unitSymbol;
     buffer[++length] = '\0';
 
     return buffer;
diff --git a/hurricane/src/hviewer/CellWidget.cpp b/hurricane/src/hviewer/CellWidget.cpp
index 5707e913..b84af9d4 100644
--- a/hurricane/src/hviewer/CellWidget.cpp
+++ b/hurricane/src/hviewer/CellWidget.cpp
@@ -1906,7 +1906,7 @@ namespace Hurricane {
 
           textGrad = DbU::getValueString( gradStep*tick
                                         , DbU::SmartTruncate|((symbolicMode())?DbU::Symbolic:DbU::Grid) );
-          if ( tick ) textGrad.resize ( textGrad.size()-1 );
+          textGrad.resize ( textGrad.size()-((*textGrad.rbegin()=='m')?2:1) );
 
           drawDisplayText ( QPoint ( pxGrad - 1, pxOrigin.y() + tickLength )
                           , textGrad.c_str()
@@ -1920,7 +1920,7 @@ namespace Hurricane {
       _drawingPlanes.painter().drawLine ( pxAngle.x(), pxAngle.y()
                                         , pxAngle.x(), pxAngle.y()+tickLength );
 
-      textGrad = DbU::getValueString ( angle.getX() - origin.getX()
+      textGrad = DbU::getValueString ( abs(angle.getX() - origin.getX())
                                      , DbU::SmartTruncate|((symbolicMode())?DbU::Symbolic:DbU::Grid) );
     //textGrad.resize ( textGrad.size()-1 );
 
@@ -1966,7 +1966,7 @@ namespace Hurricane {
 
           textGrad  = DbU::getValueString( gradStep*tick
                                          , DbU::SmartTruncate|((symbolicMode())?DbU::Symbolic:DbU::Grid) );
-          if ( tick ) textGrad.resize ( textGrad.size()-1 );
+          textGrad.resize ( textGrad.size()-((*textGrad.rbegin()=='m')?2:1) );
 
           drawDisplayText ( QPoint(pxOrigin.x() - tickLength,pyGrad + 1)
                           , textGrad.c_str()
@@ -1980,8 +1980,8 @@ namespace Hurricane {
       _drawingPlanes.painter().drawLine ( pxOrigin.x()           , pxAngle.y()
                                         , pxOrigin.x()-tickLength, pxAngle.y() );
 
-      textGrad  = DbU::getValueString( angle.getY() - origin.getY()
-                                     , DbU::SmartTruncate|((symbolicMode())?DbU::Symbolic:DbU::Grid) );
+      textGrad = DbU::getValueString( abs(angle.getY() - origin.getY())
+                                    , DbU::SmartTruncate|((symbolicMode())?DbU::Symbolic:DbU::Grid) );
     //textGrad.resize ( textGrad.size()-1 );
 
       drawDisplayText ( QPoint(pxOrigin.x() - tickLength,pxAngle.y() + 1)