diff --git a/app/helpers/render.php b/app/helpers/render.php
index eba0822..5f9e554 100644
--- a/app/helpers/render.php
+++ b/app/helpers/render.php
@@ -1,37 +1,60 @@
 <?php
 
 // render config variables array
-function renderConfig($config, $indent) {
+function renderConfig($config, $indent, $platform=false) {
+    global $app_root;
+        if (isset($platform) && $platform === true) {
+?>
+                        <div class="border bg-light" style="padding-left: <?= $indent ?>px; padding-bottom: 20px; padding-top: 20px;">
+<?php   } else {
 ?>
                         <div style="padding-left: <?= $indent ?>px; padding-bottom: 20px;">
 <?php
-    foreach ($config as $config_item => $config_value) {
+        }
+        foreach ($config as $config_item => $config_value) {
 ?>
                             <div class="row mb-1" style="padding-left: <?= $indent ?>px;">
                                 <div class="col-md-4 text-end">
                                     <?= htmlspecialchars($config_item) ?>:
                                 </div>
 <?php
-        if (is_array($config_value)) {
-?>
+            if (isset($platform) && $platform === true) { ?>
+                                <div class="col-md-8 text-start">
+                                    <a class="btn btn-secondary" style="padding: 2px;" href="<?= $app_root ?>?platform=<?= htmlspecialchars($config_item) ?>&page=config&action=edit">edit</a>
 <?php
-            // here we render recursively nested arrays
-            $indent = $indent + 50;
-            renderConfig($config_value, $indent);
-            $indent = 0;
-        } else {
-            // if it's not array, just display it
+            // we don't delete the last platform
+            if (count($config) <= 1) { ?>
+                                    <span class="btn btn-light" style="padding: 2px;" href="#" data-toggle="tooltip" data-placement="right" data-offset="30.0" title="can't delete the last platform">delete</span>
+<?php           } else { ?>
+                                    <a class="btn btn-danger" style="padding: 2px;" href="<?= $app_root ?>?platform=<?= htmlspecialchars($config_item) ?>&page=config&action=delete">delete</a>
+<?php           } ?>
+                                </div>
+<?php       }
+
+            if (is_array($config_value)) {
+                if ($config_item === 'platforms') {
+                    $platform = true;
+                } else {
+                    $platform = false;
+                }
+                // here we render recursively nested arrays
+                $indent = $indent + 50;
+                renderConfig($config_value, $indent, $platform);
+                $indent = 0;
+            } else {
+                // if it's not array, just display it
 ?>
                                 <div class="border col-md-8 text-start">
                                     <?= htmlspecialchars($config_value ?? '')?>
+<?= $platform ?>
                                 </div>
 <?php
-        }
+            }
 ?>
                             </div>
 <?php
-    }
-echo '</div>';
+        }
+    echo '</div>';
 }
 
 ?>
diff --git a/app/templates/config-edit-platform.php b/app/templates/config-edit-platform.php
index 27eeb20..f6e7519 100644
--- a/app/templates/config-edit-platform.php
+++ b/app/templates/config-edit-platform.php
@@ -17,6 +17,7 @@
                             </div>
 <?php } ?>
                             <br />&nbsp;<br />
+                            <a class="btn btn-secondary" href="<?= $app_root ?>?platform=<?= htmlspecialchars($platform_id) ?>&page=config" />Cancel</a>
                             <input type="submit" class="btn btn-primary" value="Save" />
                         </form>
                     </div>
diff --git a/app/templates/config-list.php b/app/templates/config-list.php
index ab081b2..ac1fb7b 100644
--- a/app/templates/config-list.php
+++ b/app/templates/config-list.php
@@ -1,6 +1,6 @@
 
                 <!-- widget "config" -->
-                <div class="card text-center w-50 mx-lef">
+                <div class="card text-center w-75 mx-lef">
                     <p class="h4 card-header">Jilo web configuration</p>
                     <div class="card-body">
                         <p class="card-text">platform variables</p>
diff --git a/app/templates/page-menu.php b/app/templates/page-menu.php
index ba0a607..e1d5c37 100644
--- a/app/templates/page-menu.php
+++ b/app/templates/page-menu.php
@@ -11,21 +11,12 @@
 <li class="font-weight-light text-uppercase" style="font-size: 0.5em; color: whitesmoke; margin-right: 70px; align-content: center;">version&nbsp;<?php echo $config['version']; ?></li>
 
 <?php if ( isset($_SESSION['username']) ) { ?>
-                <!--li><a href="?page=config">config</a></li>
-                <li><a href="?page=conferences">conferences</a></li>
-                <li><a href="?page=participants">participants</a></li>
-                <li><a href="?page=components">components</a></li-->
 
-                <li style="margin-right: 0px;">
+                <li style="margin-right: 3px;">
                     <a style="background-color: #111;" href="?platform=<?= htmlspecialchars(array_keys($config['platforms'])[$platform_id]) ?>&page=front">
                         <?= htmlspecialchars($config['platforms'][$platform_id]['name']) ?>
                     </a>
                 </li>
-                <li style="margin: 0px; padding: 0px;">
-                    <a style="background-color: #555; padding-left: 3px; padding-right: 3px;" href="?platform=<?= htmlspecialchars(array_keys($config['platforms'])[$platform_id]) ?>&page=config&action=edit">
-                        <i class="fas fa-wrench" data-toggle="tooltip" data-placement="right" data-offset="30.0" title="configure platform &quot;<?= htmlspecialchars($config['platforms'][$platform_id]['name']) ?>&quot;"></i>
-                    </a>
-                </li>
 
 <?php } ?>
             </ul>