diff --git a/examples/ScatterCtrl_Demo/ScatterCtrl_Demo.h b/examples/ScatterCtrl_Demo/ScatterCtrl_Demo.h
index 194c3e146..04b3b8bfa 100644
--- a/examples/ScatterCtrl_Demo/ScatterCtrl_Demo.h
+++ b/examples/ScatterCtrl_Demo/ScatterCtrl_Demo.h
@@ -104,6 +104,8 @@ public:
 	
 	void Init();
 	void FormatX(String& s, int i, double d);	
+	void FormatXGridUnits(String& s, int i, double d);
+	void SetGridLinesX(Vector<double>& unitsX);
 	virtual ScatterCtrl &Scatter()	{return scatter;};
 
 private:
diff --git a/examples/ScatterCtrl_Demo/tab6_Logarithmic.cpp b/examples/ScatterCtrl_Demo/tab6_Logarithmic.cpp
index 371f5de31..4516783ed 100644
--- a/examples/ScatterCtrl_Demo/tab6_Logarithmic.cpp
+++ b/examples/ScatterCtrl_Demo/tab6_Logarithmic.cpp
@@ -9,15 +9,40 @@ void Tab6_Logarithmic::Init()
 	scatter.SetRange(6,100);
 	scatter.SetMajorUnits(1,20);
 	scatter.ShowInfo();
+	scatter.SetMouseHandling(false, false);
 	
 	s1 <<Pointf(log10(10.0),14)<<Pointf(log10(1e2),25)<<Pointf(log10(1e3),39)<<Pointf(log10(1e4),44)<<Pointf(log10(1e5),76);
 	scatter.AddSeries(s1).Legend("series1");
 	scatter.cbModifFormatX = THISBACK(FormatX);
+	scatter.cbModifFormatXGridUnits = THISBACK(FormatXGridUnits);
+	scatter.SetGridLinesX = THISBACK(SetGridLinesX);
 }
 
 void Tab6_Logarithmic::FormatX(String& s, int i, double d)
 {
-	s = FormatDouble(pow(10., d), 0);
+	double val = pow(10, d);
+	if (val >= 1 && val <= 1e5)
+		s = FormatDoubleExp(val, 0);
+}
+
+void Tab6_Logarithmic::FormatXGridUnits(String& s, int i, double d)
+{
+	double val = pow(10, d);
+	int valint = fround(val);
+	if (abs(val - double(valint)) < 0.0001) {
+		while (valint < -9 || valint > 9) 
+			valint /= 10;
+		if (valint == 1)
+			s = FormatDoubleExp(pow(10, d), 0);
+	}
+}
+
+void Tab6_Logarithmic::SetGridLinesX(Vector<double>& unitsX)
+{
+	for(int i = 0; scatter.GetXMinUnit() + i*scatter.GetMajorUnitsX() <= scatter.GetXRange(); i++) {
+		for (int ii = 0; ii < 9; ++ii)
+			unitsX << scatter.GetXMinUnit() + i*scatter.GetMajorUnitsX() + (log10((ii+1)*10)-1)*scatter.GetMajorUnitsX();
+	}
 }
 
 ScatterDemo *Construct6()