diff --git a/Classes/DataProcessing/CopyToProcessor.php b/Classes/DataProcessing/CopyToProcessor.php
index 28c4294..159701f 100644
--- a/Classes/DataProcessing/CopyToProcessor.php
+++ b/Classes/DataProcessing/CopyToProcessor.php
@@ -27,11 +27,21 @@ class CopyToProcessor implements ProcessorInterface
 {
     public function processData(array $record, array $configuration) : array
     {
-        $all = [];
+        $target = [];
 
-        $this->addArray($all, $record);
-        $all = array_filter($all);
-        $record[$configuration['to']] = implode(PHP_EOL, $all);
+        $from = $record;
+        if (isset($configuration['from'])) {
+            $from = $record[$configuration['from']];
+        }
+
+        if (is_array($from)) {
+            $this->addArray($target, $from);
+        } else {
+            $target[] = (string) $from;
+        }
+
+        $target = array_filter($target);
+        $record[$configuration['to']] = implode(PHP_EOL, $target);
 
         return $record;
     }
diff --git a/Documentation/source/configuration/dataProcessing/CopyToProcessor.rst b/Documentation/source/configuration/dataProcessing/CopyToProcessor.rst
index 6d83d70..07faef1 100644
--- a/Documentation/source/configuration/dataProcessing/CopyToProcessor.rst
+++ b/Documentation/source/configuration/dataProcessing/CopyToProcessor.rst
@@ -8,6 +8,10 @@ Possible Options:
 ``to``
     Defines the field to copy the values into. All values not false will be copied at the moment.
 
+``from``
+    Optional, defines the field to copy, can only be one field.
+    If empty, all existing fields will be copied.
+
 Example::
 
     plugin.tx_searchcore.settings.indexing.tt_content.dataProcessing {
@@ -17,7 +21,8 @@ Example::
         }
         2 = Codappix\SearchCore\DataProcessing\CopyToProcessor
         2 {
-            to = spellcheck
+            from = uid
+            to = backup_uid
         }
     }
 
diff --git a/Tests/Unit/DataProcessing/CopyToProcessorTest.php b/Tests/Unit/DataProcessing/CopyToProcessorTest.php
index 28545a3..6968d25 100644
--- a/Tests/Unit/DataProcessing/CopyToProcessorTest.php
+++ b/Tests/Unit/DataProcessing/CopyToProcessorTest.php
@@ -80,6 +80,18 @@ class CopyToProcessorTest extends AbstractUnitTestCase
                     'new_field' => 'Some content like lorem' . PHP_EOL . 'Tag 1' . PHP_EOL . 'Tag 2',
                 ],
             ],
+            'Copy single field to new field' => [
+                'record' => [
+                    'field 1' => 'Some content like lorem',
+                ],
+                'configuration' => [
+                    'to' => 'new_field',
+                ],
+                'expectedData' => [
+                    'field 1' => 'Some content like lorem',
+                    'new_field' => 'Some content like lorem',
+                ],
+            ],
         ];
     }
 }