diff --git a/docs/changes/1.x/1.5.0.md b/docs/changes/1.x/1.5.0.md
index b96865bada..d2240e7ef1 100644
--- a/docs/changes/1.x/1.5.0.md
+++ b/docs/changes/1.x/1.5.0.md
@@ -4,6 +4,8 @@
 
 ## Enhancements
 
+- adds the setDisplayBlanksAs option to the Chart Style, allowing users to handle null values in series data. You can choose 'gap' (break line), 'span' (connect line), or 'zero' (display nulls as zero, as it the current default). 
+
 ### Bug fixes
 
 - Set writeAttribute return type by [@radarhere](https://github.com/radarhere) fixing [#2204](https://github.com/PHPOffice/PHPWord/issues/2204) in [#2776](https://github.com/PHPOffice/PHPWord/pull/2776)
@@ -16,4 +18,4 @@
 
 ### BC Breaks
 
-### Notes
\ No newline at end of file
+### Notes
diff --git a/docs/usage/styles/chart.md b/docs/usage/styles/chart.md
index f297718d24..99e4016136 100644
--- a/docs/usage/styles/chart.md
+++ b/docs/usage/styles/chart.md
@@ -16,4 +16,5 @@ Available Chart style options:
 - ``majorTickMarkPos``. The position for major tick marks, *in*, *out*, *cross*, *none* (default).
 - ``showAxisLabels``. Show labels for axis, *true* or *false*.
 - ``gridX``. Show Gridlines for X-Axis, *true* or *false*.
-- ``gridY``. Show Gridlines for Y-Axis, *true* or *false*.
\ No newline at end of file
+- ``gridY``. Show Gridlines for Y-Axis, *true* or *false*.
+- ``setDisplayBlanksAs``. How to display null values, *zero*, *span*, *gap* (default).
diff --git a/header-footer-images-test-result.docx b/header-footer-images-test-result.docx
new file mode 100644
index 0000000000..a855345141
Binary files /dev/null and b/header-footer-images-test-result.docx differ
diff --git a/src/PhpWord/Style/Chart.php b/src/PhpWord/Style/Chart.php
index 3773565ce9..bb19d95999 100644
--- a/src/PhpWord/Style/Chart.php
+++ b/src/PhpWord/Style/Chart.php
@@ -149,6 +149,14 @@ class Chart extends AbstractStyle
      */
     private $gridX = false;
 
+    /**
+     * How to display blank values (nulls) in series data.
+     * Options: 'gap' (break line), 'span' (connect line), 'zero' (plot as zero).
+     *
+     * @var string
+     */
+    private $displayBlanksAs = 'gap'; // Default to gap
+
     /**
      * Create a new instance.
      *
@@ -548,4 +556,31 @@ public function setShowGridX($value = true)
 
         return $this;
     }
+
+    /**
+     * Set display blanks as option.
+     *
+     * @param string $value 'gap', 'span', or 'zero'
+     *
+     * @return self
+     */
+    public function setDisplayBlanksAs($value)
+    {
+        $validValues = ['gap', 'span', 'zero'];
+        if (in_array($value, $validValues)) {
+            $this->displayBlanksAs = $value;
+        }
+
+        return $this;
+    }
+
+    /**
+     * Get display blanks as option.
+     *
+     * @return string
+     */
+    public function getDisplayBlanksAs()
+    {
+        return $this->displayBlanksAs;
+    }
 }
diff --git a/src/PhpWord/Writer/Word2007/Part/Chart.php b/src/PhpWord/Writer/Word2007/Part/Chart.php
index 65e686ebad..445c8272fc 100644
--- a/src/PhpWord/Writer/Word2007/Part/Chart.php
+++ b/src/PhpWord/Writer/Word2007/Part/Chart.php
@@ -205,6 +205,16 @@ private function writePlotArea(XMLWriter $xmlWriter): void
         }
 
         $xmlWriter->endElement(); // c:plotArea
+
+        $xmlWriter->startElement('c:plotVisOnly');
+        $xmlWriter->writeAttribute('val', '1');
+        $xmlWriter->endElement();
+
+        $displayBlanksAs = method_exists($style, 'getDisplayBlanksAs') ? $style->getDisplayBlanksAs() : 'gap';
+
+        $xmlWriter->startElement('c:dispBlanksAs');
+        $xmlWriter->writeAttribute('val', $displayBlanksAs);
+        $xmlWriter->endElement();
     }
 
     /**
@@ -314,13 +324,17 @@ private function writeSeriesItem(XMLWriter $xmlWriter, $type, $values): void
         foreach ($values as $value) {
             $xmlWriter->startElement('c:pt');
             $xmlWriter->writeAttribute('idx', $index);
-            if (\PhpOffice\PhpWord\Settings::isOutputEscapingEnabled()) {
-                $xmlWriter->writeElement('c:v', $value);
-            } else {
-                $xmlWriter->startElement('c:v');
-                $xmlWriter->writeRaw($value);
-                $xmlWriter->endElement(); // c:v
+
+            if ($value !== null) {
+                if (\PhpOffice\PhpWord\Settings::isOutputEscapingEnabled()) {
+                    $xmlWriter->writeElement('c:v', $value);
+                } else {
+                    $xmlWriter->startElement('c:v');
+                    $xmlWriter->writeRaw($value);
+                    $xmlWriter->endElement(); // c:v
+                }
             }
+
             $xmlWriter->endElement(); // c:pt
             ++$index;
         }
diff --git a/tests/PhpWordTests/Writer/Word2007/Part/ChartNullHandlingTest.php b/tests/PhpWordTests/Writer/Word2007/Part/ChartNullHandlingTest.php
new file mode 100644
index 0000000000..cf8bbb7b77
--- /dev/null
+++ b/tests/PhpWordTests/Writer/Word2007/Part/ChartNullHandlingTest.php
@@ -0,0 +1,77 @@
+<?php
+
+namespace PhpOffice\PhpWord\Tests\Writer\Word2007\Part;
+
+use PhpOffice\PhpWord\Element\Chart;
+use PhpOffice\PhpWord\Shared\XMLWriter;
+use PhpOffice\PhpWord\Writer\Word2007\Part\Chart as ChartWriter;
+use PHPUnit\Framework\TestCase;
+use ReflectionClass;
+
+class ChartNullHandlingTest extends TestCase
+{
+    /**
+     * Test that the Style class correctly sets/gets the property.
+     */
+    public function testSetGetDisplayBlanksAs(): void
+    {
+        // Note: Pass empty arrays for categories/values to avoid constructor errors
+        $chart = new Chart('line', [], []);
+        $style = $chart->getStyle();
+
+        // 1. Default should be 'gap'
+        self::assertEquals('gap', $style->getDisplayBlanksAs());
+
+        // 2. Test setting 'span'
+        $style->setDisplayBlanksAs('span');
+        self::assertEquals('span', $style->getDisplayBlanksAs());
+
+        // 3. Test invalid value (should remain 'span')
+        $style->setDisplayBlanksAs('invalid_option');
+        self::assertEquals('span', $style->getDisplayBlanksAs());
+    }
+
+    public function testWriteChartHandlesNullsAndGaps(): void
+    {
+        // 1. Setup Data
+        $categories = ['Jan', 'Feb', 'Mar'];
+        $values = [10, null, 20];
+        $seriesNames = ['My Series']; // <--- ADD THIS
+
+        // 2. Create Chart with Series Name
+        $chart = new Chart('line', $categories, $values, $seriesNames);
+        $chart->getStyle()->setDisplayBlanksAs('gap');
+
+        // 3. Setup Writer
+        $xmlWriter = new XMLWriter();
+        $chartWriter = new ChartWriter();
+
+        // Mock the parent writer
+        $chartWriter->setParentWriter($this->createMock(\PhpOffice\PhpWord\Writer\Word2007::class));
+
+        // 4. Inject Chart into Writer
+        $reflectionWriter = new ReflectionClass(ChartWriter::class);
+        $elementProperty = $reflectionWriter->getProperty('element');
+        $elementProperty->setAccessible(true);
+        $elementProperty->setValue($chartWriter, $chart);
+
+        // 5. Run
+        $method = $reflectionWriter->getMethod('writeChart');
+        $method->setAccessible(true);
+        $method->invokeArgs($chartWriter, [$xmlWriter]);
+
+        $xml = $xmlWriter->getData();
+
+        // --- ASSERTIONS ---
+        self::assertStringContainsString('<c:dispBlanksAs val="gap"/>', $xml);
+
+        // Check for the empty point (null value)
+        self::assertMatchesRegularExpression('/<c:pt idx="1"\s*\/?>/', $xml);
+
+        // Ensure no zero value was written for index 1
+        self::assertDoesNotMatchRegularExpression(
+            '/<c:pt idx="1"[^>]*>.*?<c:v>0<\/c:v>.*?<\/c:pt>/s',
+            $xml
+        );
+    }
+}
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