diff --git a/modules/backend/behaviors/RelationController.php b/modules/backend/behaviors/RelationController.php
index dc2191c11..099ee721e 100644
--- a/modules/backend/behaviors/RelationController.php
+++ b/modules/backend/behaviors/RelationController.php
@@ -33,7 +33,7 @@ class RelationController extends ControllerBehavior
     /**
      * @var const Postback parameter for read only mode.
      */
-    const PARAM_READ_ONLY = '_relation_read_only';
+    const PARAM_EXTRA_CONFIG = '_relation_extra_config';
 
     /**
      * @var Backend\Classes\WidgetBase Reference to the search widget object.
@@ -80,6 +80,11 @@ class RelationController extends ControllerBehavior
      */
     protected $originalConfig;
 
+    /**
+     * @var array Config provided by the relationRender method
+     */
+    protected $extraConfig;
+
     /**
      * @var bool Has the behavior been initialized.
      */
@@ -242,8 +247,8 @@ class RelationController extends ControllerBehavior
         $this->vars['relationViewWidget'] = $this->viewWidget;
         $this->vars['relationViewModel'] = $this->viewModel;
         $this->vars['relationPivotWidget'] = $this->pivotWidget;
-        $this->vars['relationReadOnly'] = $this->readOnly ? 1 : 0;
         $this->vars['relationSessionKey'] = $this->relationGetSessionKey();
+        $this->vars['relationExtraConfig'] = $this->extraConfig;
     }
 
     /**
@@ -305,6 +310,10 @@ class RelationController extends ControllerBehavior
             throw new ApplicationException(Lang::get('backend::lang.relation.missing_definition', compact('field')));
         }
 
+        if ($extraConfig = post(self::PARAM_EXTRA_CONFIG)) {
+            $this->applyExtraConfig($field, $extraConfig);
+        }
+
         $this->alias = camel_case('relation ' . $field);
         $this->config = $this->makeConfig($this->getConfig($field), $this->requiredRelationProperties);
         $this->controller->relationExtendConfig($this->config, $this->field);
@@ -317,6 +326,7 @@ class RelationController extends ControllerBehavior
         $this->relationObject = $this->model->{$field}();
         $this->relationModel = $this->relationObject->getRelated();
 
+        $this->readOnly = $this->getConfig('readOnly');
         $this->deferredBinding = $this->getConfig('deferredBinding') || !$this->model->exists;
         $this->toolbarButtons = $this->evalToolbarButtons();
         $this->viewMode = $this->evalViewMode();
@@ -364,13 +374,6 @@ class RelationController extends ControllerBehavior
                 $this->pivotWidget->bindToController();
             }
         }
-
-        /*
-         * Read only mode
-         */
-        if (post(self::PARAM_READ_ONLY, $this->getConfig('readOnly'))) {
-            $this->makeReadOnly();
-        }
     }
 
     /**
@@ -381,26 +384,30 @@ class RelationController extends ControllerBehavior
      */
     public function relationRender($field, $options = [])
     {
-        $field = $this->validateField($field);
-
+        /*
+         * Session key
+         */
         if (is_string($options)) {
             $options = ['sessionKey' => $options];
         }
 
-        /*
-         * Session key
-         */
         if (isset($options['sessionKey'])) {
             $this->sessionKey = $options['sessionKey'];
         }
 
         /*
-         * Read only mode
+         * Apply options and extra config
          */
-        if (isset($options['readOnly']) && $options['readOnly']) {
-            $this->makeReadOnly();
+        $allowConfig = ['readOnly'];
+        if ($extraConfig = array_only($options, $allowConfig)) {
+            $this->extraConfig = $extraConfig;
+            $this->applyExtraConfig($field, $extraConfig);
         }
 
+        /*
+         * Initialize
+         */
+        $this->validateField($field);
         $this->prepareVars();
 
         /*
@@ -526,9 +533,11 @@ class RelationController extends ControllerBehavior
         /*
          * Add buttons to toolbar
          */
-        $defaultButtons = $this->toolbarButtons
-            ? '~/modules/backend/behaviors/relationcontroller/partials/_toolbar.htm'
-            : null;
+        $defaultButtons = null;
+
+        if (!$this->readOnly && $this->toolbarButtons) {
+            $defaultButtons = '~/modules/backend/behaviors/relationcontroller/partials/_toolbar.htm';
+        }
 
         $defaultConfig['buttons'] = $this->getConfig('view[toolbarPartial]', $defaultButtons);
 
@@ -596,15 +605,14 @@ class RelationController extends ControllerBehavior
             $config->showSorting = $this->getConfig('view[showSorting]', true);
             $config->defaultSort = $this->getConfig('view[defaultSort]');
             $config->recordsPerPage = $this->getConfig('view[recordsPerPage]');
-            $config->showCheckboxes = $this->getConfig('view[showCheckboxes]', true);
+            $config->showCheckboxes = $this->getConfig('view[showCheckboxes]', !$this->readOnly);
             $config->recordUrl = $this->getConfig('view[recordUrl]', null);
 
             $defaultOnClick = sprintf(
-                "$.oc.relationBehavior.clickViewListRecord(':%s', '%s', '%s', %s)",
+                "$.oc.relationBehavior.clickViewListRecord(':%s', '%s', '%s')",
                 $this->relationModel->getKeyName(),
-                $this->field,
-                $this->relationGetSessionKey(),
-                $this->readOnly ? 1 : 0
+                $this->relationGetId(),
+                $this->relationGetSessionKey()
             );
 
             if ($config->recordUrl) {
@@ -737,7 +745,7 @@ class RelationController extends ControllerBehavior
                 $config->recordOnClick = sprintf(
                     "$.oc.relationBehavior.clickManageListRecord(:%s, '%s', '%s')",
                     $this->relationModel->getKeyName(),
-                    $this->field,
+                    $this->relationGetId(),
                     $this->relationGetSessionKey()
                 );
             }
@@ -748,7 +756,7 @@ class RelationController extends ControllerBehavior
                 $config->recordOnClick = sprintf(
                     "$.oc.relationBehavior.clickManagePivotListRecord(:%s, '%s', '%s')",
                     $this->relationModel->getKeyName(),
-                    $this->field,
+                    $this->relationGetId(),
                     $this->relationGetSessionKey()
                 );
             }
@@ -1412,14 +1420,16 @@ class RelationController extends ControllerBehavior
             case 'list':
                 if ($this->eventTarget == 'button-link') {
                     return 'backend::lang.relation.link_a_new';
-                } else {
+                }
+                else {
                     return 'backend::lang.relation.add_a_new';
                 }
                 break;
             case 'form':
                 if ($this->readOnly) {
                     return 'backend::lang.relation.preview_name';
-                } else {
+                }
+                else {
                     return 'backend::lang.relation.update_name';
                 }
                 break;
@@ -1492,18 +1502,15 @@ class RelationController extends ControllerBehavior
     }
 
     /**
-     * Apply read only mode.
+     * Apply extra configuration
      */
-    protected function makeReadOnly()
+    protected function applyExtraConfig($field, $config)
     {
-        $this->readOnly = true;
-
-        if ($this->toolbarWidget && !$this->getConfig('view[toolbarPartial]', false)) {
-            $this->toolbarWidget->buttons = null;
-        }
-
-        if ($this->viewWidget && $this->viewMode == 'multi' && !$this->getConfig('view[showCheckboxes]', false)) {
-            $this->viewWidget->showCheckboxes = false;
+        if (is_array($config) && isset($this->originalConfig->{$field})) {
+            $this->originalConfig->{$field} = array_merge(
+                $this->originalConfig->{$field},
+                $config
+            );
         }
     }
 
diff --git a/modules/backend/behaviors/relationcontroller/assets/js/october.relation.js b/modules/backend/behaviors/relationcontroller/assets/js/october.relation.js
index 85c052814..5ab7e07ee 100644
--- a/modules/backend/behaviors/relationcontroller/assets/js/october.relation.js
+++ b/modules/backend/behaviors/relationcontroller/assets/js/october.relation.js
@@ -9,38 +9,41 @@
             $(el).closest('.control-list').listWidget('toggleChecked', [el])
         }
 
-        this.clickViewListRecord = function(recordId, relationField, sessionKey, readOnly) {
-            var newPopup = $('<a />')
+        this.clickViewListRecord = function(recordId, relationId, sessionKey) {
+            var newPopup = $('<a />'),
+                $container = $('#'+relationId),
+                requestData = paramToObj('data-request-data', $container.data('request-data'))
 
             newPopup.popup({
                 handler: 'onRelationClickViewList',
                 size: 'huge',
-                extraData: {
+                extraData: $.extend({}, requestData, {
                     'manage_id': recordId,
-                    '_relation_field': relationField,
-                    '_session_key': sessionKey,
-                    '_relation_read_only': readOnly ? 1 : 0
-                }
+                    '_session_key': sessionKey
+                })
             })
         }
 
-        this.clickManageListRecord = function(recordId, relationField, sessionKey) {
-            var oldPopup = $('#relationManagePopup')
+        this.clickManageListRecord = function(recordId, relationId, sessionKey) {
+            var oldPopup = $('#relationManagePopup'),
+                $container = $('#'+relationId),
+                requestData = paramToObj('data-request-data', $container.data('request-data'))
 
             $.request('onRelationClickManageList', {
-                data: {
+                data: $.extend({}, requestData, {
                     'record_id': recordId,
-                    '_relation_field': relationField,
                     '_session_key': sessionKey
-                }
+                })
             })
 
             oldPopup.popup('hide')
         }
 
-        this.clickManagePivotListRecord = function(foreignId, relationField, sessionKey) {
+        this.clickManagePivotListRecord = function(foreignId, relationId, sessionKey) {
             var oldPopup = $('#relationManagePivotPopup'),
-                newPopup = $('<a />')
+                newPopup = $('<a />'),
+                $container = $('#'+relationId),
+                requestData = paramToObj('data-request-data', $container.data('request-data'))
 
             if (oldPopup.length) {
                 oldPopup.popup('hide')
@@ -49,11 +52,10 @@
             newPopup.popup({
                 handler: 'onRelationClickManageListPivot',
                 size: 'huge',
-                extraData: {
+                extraData: $.extend({}, requestData, {
                     'foreign_id': foreignId,
-                    '_relation_field': relationField,
                     '_session_key': sessionKey
-                }
+                })
             })
         }
 
@@ -71,6 +73,18 @@
             })
         }
 
+        function paramToObj(name, value) {
+            if (value === undefined) value = ''
+            if (typeof value == 'object') return value
+
+            try {
+                return JSON.parse(JSON.stringify(eval("({" + value + "})")))
+            }
+            catch (e) {
+                throw new Error('Error parsing the '+name+' attribute value. '+e)
+            }
+        }
+
     }
 
     $.oc.relationBehavior = new RelationBehavior;
diff --git a/modules/backend/behaviors/relationcontroller/partials/_container.htm b/modules/backend/behaviors/relationcontroller/partials/_container.htm
index e23b39885..85a2cce30 100644
--- a/modules/backend/behaviors/relationcontroller/partials/_container.htm
+++ b/modules/backend/behaviors/relationcontroller/partials/_container.htm
@@ -1,6 +1,6 @@
 <div
     id="<?= $this->relationGetId() ?>"
-    data-request-data="_relation_field: '<?= $relationField ?>', _relation_read_only: <?= $relationReadOnly ?>"
+    data-request-data="_relation_field: '<?= $relationField ?>', _relation_extra_config: <?= e(json_encode($relationExtraConfig)) ?>"
     class="relation-behavior relation-view-<?= $relationViewMode ?>">
 
     <?php if ($toolbar = $this->relationRenderToolbar()): ?>