diff --git a/poincare/include/poincare/sequence_layout.h b/poincare/include/poincare/sequence_layout.h
index 730931d3d..b16427163 100644
--- a/poincare/include/poincare/sequence_layout.h
+++ b/poincare/include/poincare/sequence_layout.h
@@ -8,7 +8,7 @@ namespace Poincare {
 
 class SequenceLayoutNode : public LayoutNode {
 public:
-  constexpr static KDCoordinate k_symbolHeight = 30;
+  constexpr static KDCoordinate k_symbolHeight = 29;
   constexpr static KDCoordinate k_symbolWidth = 22;
 
   using LayoutNode::LayoutNode;
diff --git a/poincare/src/sum_layout.cpp b/poincare/src/sum_layout.cpp
index 0c1051955..74cdee9d2 100644
--- a/poincare/src/sum_layout.cpp
+++ b/poincare/src/sum_layout.cpp
@@ -9,21 +9,21 @@ namespace Poincare {
 // Stores a single branch of the sigma symbol
 // Data is stored so that every two line a white pixel must be added. This way the branch's slope is respected
 constexpr static int k_significantPixelWidth = 6;
-const uint8_t symbolPixelOneBranch[(SumLayoutNode::k_symbolHeight/2-1)*k_significantPixelWidth] = {
-  0xF8, 0x2E, 0x9E, 0xFF, 0xFF, 0xFF,
-  0xFF, 0xD5, 0x15, 0xDB, 0xFF, 0xFF,
-  0xFF, 0x95, 0x35, 0xFA, 0xFF, 0xFF,
-  0xFF, 0xFE, 0x4C, 0x7A, 0xFF, 0xFF,
-  0xFF, 0xE9, 0x1B, 0xC0, 0xFF, 0xFF,
-  0xFF, 0xFF, 0xB7, 0x1F, 0xEE, 0xFF,
-  0xFF, 0xFF, 0x6F, 0x56, 0xFF, 0xFF,
-  0xFF, 0xFF, 0xF7, 0x2E, 0x9F, 0xFF,
-  0xFF, 0xFF, 0xD3, 0x16, 0xDB, 0xFF,
-  0xFF, 0xFF, 0xFF, 0x93, 0x37, 0xFA,
-  0xFF, 0xFF, 0xFE, 0x4B, 0x7B, 0xFF,
-  0xFF, 0xFF, 0xFF, 0xE8, 0x1A, 0xC0,
-  0xFF, 0xFF, 0xFF, 0xB6, 0x20, 0xEF,
-  0xFF, 0xFF, 0xFF, 0xFF, 0x6D, 0x57,
+const uint8_t symbolPixelOneBranch[((SumLayoutNode::k_symbolHeight-1)/2)*k_significantPixelWidth] = {
+  0xF1, 0x21, 0xB2, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xC5, 0x18, 0xE7, 0xFF, 0xFF,
+  0xFF, 0x7F, 0x46, 0xFE, 0xFF, 0xFF,
+  0xFF, 0xFC, 0x39, 0x8E, 0xFF, 0xFF,
+  0xFF, 0xDF, 0x15, 0xD0, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xA4, 0x2A, 0xF6, 0xFF,
+  0xFF, 0xFF, 0x5A, 0x69, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xF1, 0x21, 0xB2, 0xFF,
+  0xFF, 0xFF, 0xC5, 0x18, 0xE7, 0xFF,
+  0xFF, 0xFF, 0xFF, 0x7F, 0x46, 0xFE,
+  0xFF, 0xFF, 0xFC, 0x3A, 0x8E, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xDF, 0x15, 0xD0,
+  0xFF, 0xFF, 0xFF, 0xA0, 0x20, 0xF6,
+  0xFF, 0xFF, 0XFF, 0xFF, 0xAB, 0x28,
 };
 
 int SumLayoutNode::serialize(char * buffer, int bufferSize, Preferences::PrintFloatMode floatDisplayMode, int numberOfSignificantDigits) const {
@@ -35,15 +35,12 @@ void SumLayoutNode::render(KDContext * ctx, KDPoint p, KDColor expressionColor,
   uint8_t symbolPixel[k_symbolHeight * k_symbolWidth];
   int whiteOffset;
 
-  // Taking care of the first line which is a straight line
-  // First pixel is antialized
-  symbolPixel[0] = 0x70;
-  // The rest of the bar is black
-  for (int j = 1; j < k_symbolWidth; j++) {
+  // Taking care of the first line which is a black straight line
+  for (int j = 0; j < k_symbolWidth; j++) {
     symbolPixel[j] = 0x00;
   }
-  static_assert(k_symbolHeight%2 == 0, "sum_layout : k_symbolHeight is not even");
-  for (int i = 1; i < k_symbolHeight/2; i++) {
+  static_assert(k_symbolHeight%2 != 0, "sum_layout : k_symbolHeight is even");
+  for (int i = 1; i < (k_symbolHeight + 1)/2; i++) {
     // Adding the white offset
     whiteOffset = (i-1)/2;
     for (int j = 0; j < whiteOffset; j++) {
@@ -62,7 +59,7 @@ void SumLayoutNode::render(KDContext * ctx, KDPoint p, KDColor expressionColor,
   }
 
   // Create real size sigma symbol by flipping the previous array
-  for (int i = k_symbolHeight/2; i < k_symbolHeight; i++) {
+  for (int i = k_symbolHeight/2 + 1; i < k_symbolHeight; i++) {
     for (int j = 0; j < k_symbolWidth; j++) {
       symbolPixel[i*k_symbolWidth + j] = symbolPixel[(k_symbolHeight-i-1)*k_symbolWidth +j];
     }