diff --git a/app/src/processing/app/SerialPlotter.java b/app/src/processing/app/SerialPlotter.java
index 035005ac362..ebbd23f2cbe 100644
--- a/app/src/processing/app/SerialPlotter.java
+++ b/app/src/processing/app/SerialPlotter.java
@@ -41,6 +41,7 @@ public class SerialPlotter extends AbstractMonitor {
 
   private final StringBuffer messageBuffer;
   private JComboBox<String> serialRates;
+  private JSpinner graphWidth;
   private Serial serial;
   private int serialRate, xCount;
 
@@ -50,15 +51,18 @@ public class SerialPlotter extends AbstractMonitor {
   private JComboBox<String> lineEndings;
 
   private ArrayList<Graph> graphs;
-  private final static int BUFFER_CAPACITY = 500;
+  private final static int BUFFER_CAPACITY_DEFAULT = 500;
+  private final static int BUFFER_CAPACITY_MAX = 5000;
+  private final static int BUFFER_CAPACITY_MIN = 10;
+  private int buffer_capacity = BUFFER_CAPACITY_DEFAULT;
 
   private static class Graph {
     public CircularBuffer buffer;
     private Color color;
     public String label;
 
-    public Graph(int id) {
-      buffer = new CircularBuffer(BUFFER_CAPACITY);
+    public Graph(int id, int capacity) {
+      buffer = new CircularBuffer(capacity);
       color = Theme.getColorCycleColor("plotting.graphcolor", id);
     }
 
@@ -156,12 +160,12 @@ public void paintComponent(Graphics g1) {
       }
 
       // handle data count
-      int cnt = xCount - BUFFER_CAPACITY;
-      if (xCount < BUFFER_CAPACITY) cnt = 0;
+      int cnt = xCount - buffer_capacity;
+      if (xCount < buffer_capacity) cnt = 0;
         
       double zeroTick = ticks.getTick(0);
       double lastTick = ticks.getTick(ticks.getTickCount() - 1);
-      double xTickRange = BUFFER_CAPACITY / ticks.getTickCount();
+      double xTickRange = buffer_capacity / ticks.getTickCount();
         
       for (int i = 0; i < ticks.getTickCount() + 1; i++) {
           String s;
@@ -177,7 +181,7 @@ public void paintComponent(Graphics g1) {
               s = String.valueOf((int)(xTickRange * i)+cnt);
               fBounds = fm.getStringBounds(s, g);
               sWidth = (int)fBounds.getWidth()/2;
-              xValue = (int)((bounds.width - xOffset - xPadding) * ((xTickRange * i) / BUFFER_CAPACITY) + xOffset);
+              xValue = (int)((bounds.width - xOffset - xPadding) * ((xTickRange * i) / buffer_capacity) + xOffset);
           }
           // draw graph x axis, ticks and labels
           g.setColor(boundsColor);
@@ -194,8 +198,8 @@ public void paintComponent(Graphics g1) {
       g.drawLine(xOffset, (int) transformY(zeroTick), bounds.width - xPadding, (int)transformY(zeroTick));
         
       g.setTransform(AffineTransform.getTranslateInstance(xOffset, 0));
-      float xstep = (float) (bounds.width - xOffset - xPadding) / (float) BUFFER_CAPACITY;
-
+      float xstep = (float) (bounds.width - xOffset - xPadding) / (float) buffer_capacity;
+ 
       // draw legend
       int legendXOffset = 0;
       for(int i = 0; i < graphs.size(); ++i) {
@@ -255,6 +259,8 @@ public SerialPlotter(BoardPort port) {
 
     messageBuffer = new StringBuffer();
     graphs = new ArrayList<>();
+
+    graphWidth.addChangeListener(cl -> {setNewBufferCapacity((int)graphWidth.getValue()); } );
   }
 
   protected void onCreateWindow(Container mainPane) {
@@ -273,9 +279,20 @@ protected void onCreateWindow(Container mainPane) {
 
     serialRates.setMaximumSize(serialRates.getMinimumSize());
 
+    graphWidth = new JSpinner(new SpinnerNumberModel(
+                               BUFFER_CAPACITY_DEFAULT, //initial value
+                               BUFFER_CAPACITY_MIN, //min
+                               BUFFER_CAPACITY_MAX, //max
+                               1));                //step
+    graphWidth.setMaximumSize(graphWidth.getMinimumSize());
+    JSpinner.NumberEditor editor = new JSpinner.NumberEditor(graphWidth);
+    editor.getFormat().setGroupingUsed(false);
+    graphWidth.setEditor(editor);
+    
     pane.add(Box.createHorizontalGlue());
     pane.add(Box.createRigidArea(new Dimension(8, 0)));
     pane.add(serialRates);
+    pane.add(graphWidth);
 
     mainPane.add(pane, BorderLayout.SOUTH);
 
@@ -373,7 +390,7 @@ public void onSendCommand(ActionListener listener) {
     sendButton.addActionListener(listener);
   }
 
-  public void appyPreferences() {
+  public void applyPreferences() {
     // Apply line endings.
     if (PreferencesData.get("serial.line_ending") != null) {
       lineEndings.setSelectedIndex(PreferencesData.getInteger("serial.line_ending"));
@@ -382,13 +399,30 @@ public void appyPreferences() {
 
   protected void onEnableWindow(boolean enable) {
     textField.setEnabled(enable);
+    serialRates.setEnabled(enable);
     sendButton.setEnabled(enable);
+    graphWidth.setEnabled(enable);
   }
 
   private void onSerialRateChange(ActionListener listener) {
     serialRates.addActionListener(listener);
   }
 
+  private void setNewBufferCapacity(int capacity){
+    if(buffer_capacity != capacity) {
+      
+      if(capacity > BUFFER_CAPACITY_MAX) buffer_capacity = BUFFER_CAPACITY_MAX;
+      else if(capacity < BUFFER_CAPACITY_MIN) buffer_capacity = BUFFER_CAPACITY_MIN;
+      else buffer_capacity = capacity;
+      
+      for(int i = 0; i < graphs.size(); i++) {
+        graphs.get(i).buffer.newCapacity(buffer_capacity);
+      }
+
+      xCount = 0;
+    }
+  }
+
   public void message(final String s) {
     messageBuffer.append(s);
     while (true) {
@@ -451,14 +485,14 @@ public void message(final String s) {
         
         if(value != null) {
           if(validParts >= graphs.size()) {
-            graphs.add(new Graph(validParts));
+            graphs.add(new Graph(validParts, buffer_capacity));
           }
           graphs.get(validParts).buffer.add(value);
           validParts++;
         }
         if(label != null) {
           if(validLabels >= graphs.size()) {
-            graphs.add(new Graph(validLabels));
+            graphs.add(new Graph(validLabels, BUFFER_CAPACITY_DEFAULT));
           }
           graphs.get(validLabels).label = label;
           validLabels++;
diff --git a/app/src/processing/app/helpers/CircularBuffer.java b/app/src/processing/app/helpers/CircularBuffer.java
index 8396c8fd2e1..b4a2bada888 100644
--- a/app/src/processing/app/helpers/CircularBuffer.java
+++ b/app/src/processing/app/helpers/CircularBuffer.java
@@ -4,10 +4,10 @@
 
 public class CircularBuffer {
 
-  private final double[] elements;
+  private double[] elements;
   private int start = -1;
   private int end = -1;
-  private final int capacity;
+  private int capacity;
 
   public void add(double num) {
     end = (end + 1) % capacity;
@@ -37,6 +37,12 @@ public CircularBuffer(int capacity) {
     elements = new double[capacity];
   }
 
+  public void newCapacity(int capacity) {
+    elements = new double[capacity];
+    this.capacity = capacity;
+    start = end = 0;
+  }
+  
   public double min() {
     if (size() == 0) {
       throw new NoSuchElementException();