diff --git a/apps/constant.h b/apps/constant.h
index b2e70ce9a..c498624a8 100644
--- a/apps/constant.h
+++ b/apps/constant.h
@@ -4,7 +4,7 @@
 class Constant {
 public:
   constexpr static int LargeNumberOfSignificantDigits = 7;
-  constexpr static int MediumNumberOfSignificantDigits = 6;
+  constexpr static int MediumNumberOfSignificantDigits = 5;
   constexpr static int ShortNumberOfSignificantDigits = 4;
 };
 
diff --git a/apps/graph/graph/graph_controller_helper.cpp b/apps/graph/graph/graph_controller_helper.cpp
index faa280942..c85ba2b81 100644
--- a/apps/graph/graph/graph_controller_helper.cpp
+++ b/apps/graph/graph/graph_controller_helper.cpp
@@ -25,9 +25,9 @@ void GraphControllerHelper::reloadDerivativeInBannerViewForCursorOnFunction(Shar
   buffer[0] = function->name()[0];
   buffer[1] = '\'';
   double y = function->approximateDerivative(cursor->x(), app->localContext());
-  numberOfChar += Complex<double>::convertFloatToText(y, buffer + legendLength, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
+  numberOfChar += Complex<double>::convertFloatToText(y, buffer + legendLength, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::ShortNumberOfSignificantDigits), Constant::ShortNumberOfSignificantDigits);
   strlcpy(buffer+numberOfChar, space, spaceLength+1);
-  buffer[Shared::FunctionBannerDelegate::k_maxLegendLength] = 0;
+  buffer[k_maxDigitLegendLength+6] = 0;
   bannerView()->setLegendAtIndex(buffer, 2);
 }
 
diff --git a/apps/graph/graph/graph_controller_helper.h b/apps/graph/graph/graph_controller_helper.h
index 2fc0960e0..3122755d9 100644
--- a/apps/graph/graph/graph_controller_helper.h
+++ b/apps/graph/graph/graph_controller_helper.h
@@ -10,6 +10,7 @@ namespace Graph {
 
 class GraphControllerHelper {
 protected:
+  constexpr static int k_maxDigitLegendLength = 10;
   bool privateMoveCursorHorizontally(Shared::CurveViewCursor * cursor, int direction, Shared::InteractiveCurveViewRange * range, int numberOfStepsInGradUnit, Shared::Function * function, Shared::TextFieldDelegateApp * app, float cursorTopMarginRatio, float cursorRightMarginRatio, float cursorBottomMarginRatio, float cursorLeftMarginRatio);
   void reloadDerivativeInBannerViewForCursorOnFunction(Shared::CurveViewCursor * cursor, CartesianFunction * function, Shared::TextFieldDelegateApp * app);
   virtual Shared::BannerView * bannerView() = 0;
diff --git a/apps/shared/function_banner_delegate.cpp b/apps/shared/function_banner_delegate.cpp
index 45060630c..f7b8ffc6a 100644
--- a/apps/shared/function_banner_delegate.cpp
+++ b/apps/shared/function_banner_delegate.cpp
@@ -17,7 +17,7 @@ void FunctionBannerDelegate::reloadBannerViewForCursorOnFunction(CurveViewCursor
   buffer[0] = symbol;
   numberOfChar += Complex<float>::convertFloatToText(cursor->x(), buffer+numberOfChar, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
   strlcpy(buffer+numberOfChar, space, spaceLength+1);
-  buffer[k_maxLegendLength] = 0;
+  buffer[k_maxDigitLegendLength+2] = 0;
   bannerView()->setLegendAtIndex(buffer, 0);
 
   numberOfChar = 0;
@@ -29,7 +29,7 @@ void FunctionBannerDelegate::reloadBannerViewForCursorOnFunction(CurveViewCursor
   buffer[0] = function->name()[0];
   numberOfChar += Complex<float>::convertFloatToText(cursor->y(), buffer+legendLength, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
   strlcpy(buffer+numberOfChar, space, spaceLength+1);
-  buffer[k_maxLegendLength] = 0;
+  buffer[k_maxDigitLegendLength+5] = 0;
   bannerView()->setLegendAtIndex(buffer, 1);
 }
 
diff --git a/apps/shared/function_banner_delegate.h b/apps/shared/function_banner_delegate.h
index d557110c8..be824cf3f 100644
--- a/apps/shared/function_banner_delegate.h
+++ b/apps/shared/function_banner_delegate.h
@@ -9,9 +9,9 @@ namespace Shared {
 
 class FunctionBannerDelegate  {
 public:
-  constexpr static int k_maxLegendLength = 14;
   constexpr static int k_maxNumberOfCharacters = 50;
 protected:
+  constexpr static int k_maxDigitLegendLength = 11;
   void reloadBannerViewForCursorOnFunction(CurveViewCursor * cursor, Function * function, char symbol);
   virtual BannerView * bannerView() = 0;
 };