diff --git a/phpxpress/examples/card.php b/phpxpress/examples/card.php
index a561c35..7e3c853 100644
--- a/phpxpress/examples/card.php
+++ b/phpxpress/examples/card.php
@@ -49,9 +49,18 @@
             $card2->addElementToList("of various sentences");
             $card2->addLink("Link1", "#");
             $card2->addLink("Link2", "#");
+
+            $card2->onFieldDisplaying("onFieldDisplaying");
+
             $card2->draw();
 
             Card::endCardGroupLayout();
+
+            function onFieldDisplaying(&$field , &$value){
+                if($field == "Inhabitants"){
+                    $value .= " (census 2019)";
+                }
+            }
         ?>
     </body>
 </html>
\ No newline at end of file
diff --git a/phpxpress/phpxpress/card.php b/phpxpress/phpxpress/card.php
index eb01deb..7f0b615 100644
--- a/phpxpress/phpxpress/card.php
+++ b/phpxpress/phpxpress/card.php
@@ -2,6 +2,8 @@
     include "include.php";
 
     class Card{
+        
+        // Structure
         private $imageSource;
         private $title;
         private $subtitle;
@@ -12,6 +14,11 @@
         private $list;
         private $linksArray;
         private $button;
+
+        // Events
+        private $onFieldDisplayingFunctionName;
+
+        // Layout
         private $borderColor;
         private $cardColor;
         private $textColor;
@@ -140,10 +147,14 @@
             echo '<div class="card-body">';
             echo '<h5 class="card-title">'. $this->title .'</h5>'; // title
             echo '<h6 class="card-subtitle mb-2 text-muted">'. $this->subtitle .'</h6>'; // subtitle
-            echo '<p class="card-text">'. $this->innerText . '</p>'; // text
+            echo '<p class="card-text">'. $this->innerText . '</p>'; // innertext
 
-            if(isset($this->fieldsArray)){ // fields
+            // fields
+            if(isset($this->fieldsArray)){
                 foreach($this->fieldsArray as $field => $value){
+                    if(isset($this->onFieldDisplayingFunctionName)){
+                        call_user_func_array($this -> onFieldDisplayingFunctionName , array(&$field, &$value));
+                    }
                     echo '<p class="card-text"><b>' . $field . ': </b>' . $value . '</p>';
                 }
             }
@@ -174,6 +185,23 @@
             echo '</div></div>';
         }
 
+        /*
+        ** The Event "onFieldDisplaying" gets fired just before the displaying of a field within
+        ** a card, so you can display your own value.
+        ** The function you have to provide must have this signature:
+        **
+        **                        function myFunction(&$field , &$value){...}
+        **
+        ** You can change "field" snd "value" to whichever name you want.
+        **
+        */
+        function onFieldDisplaying($functionName){
+            if(!is_callable($functionName))
+                throw new InvalidArgumentException("Couldn't call $functionName. You must provide the name of a function.");
+
+            $this -> onFieldDisplayingFunctionName = $functionName;
+        }
+
         /*
         ** Using this overrides the card's width (known error from Bootstrap), so you should specify a width.
         ** It always has to be closed with endCardGroupLayout()
diff --git a/phpxpress/phpxpress/table.php b/phpxpress/phpxpress/table.php
index 9521836..b3eb223 100644
--- a/phpxpress/phpxpress/table.php
+++ b/phpxpress/phpxpress/table.php
@@ -2,6 +2,7 @@
     include "include.php";
 
     class Table{
+      
       // Structure
       private $dataSource;
       private $columnCaptions;
@@ -57,17 +58,21 @@
 
       }
 
+      /*
+      ** Datasource can be either an array of object(s) or
+      ** an array of array(s).
+      */
       function setDataSource(Array $dataSource){
         if(empty($dataSource))
           throw new InvalidArgumentException('Parameter cannot be empty.');
         
         $this->dataSource = $dataSource;
 
-        // if array of objects provided
+        // Set captions when array of objects provided
         if(is_object($dataSource[0]))
           $this->columnCaptions = array_keys(get_object_vars($this->dataSource[0]));
 
-        // if array of arrays provided
+        // Set captione when array of arrays provided
         else if(is_array($dataSource[0]))
           $this->columnCaptions = array_keys($this->dataSource[0]);
       }
@@ -107,12 +112,12 @@
 
       /*
       ** The Event "onValueDisplaying" gets fired just before the displaying of a value within
-      ** a table body, so you can display your own value if you want to.
+      ** a table body, so you can display your own value.
       ** The function you have to provide must have this signature:
       **
       **                        function myFunction($caption, &$value, $row){...}
       **
-      ** You can change "caption" and "value" to whichever name you want.
+      ** You can change "caption", "value" and "row" to whichever name you want.
       **
       ** caption: the ACTUAL fieldname of the dataSource whose value belongs to
       ** value:   the value you want to display.