diff --git a/datamodels/2.x/itop-portal-base/portal/src/forms/objectformmanager.class.inc.php b/datamodels/2.x/itop-portal-base/portal/src/forms/objectformmanager.class.inc.php
index eaf8d409b..1d073763b 100644
--- a/datamodels/2.x/itop-portal-base/portal/src/forms/objectformmanager.class.inc.php
+++ b/datamodels/2.x/itop-portal-base/portal/src/forms/objectformmanager.class.inc.php
@@ -286,9 +286,7 @@ class ObjectFormManager extends FormManager
 		$sObjectClass = get_class($this->oObject);
 
 		$aFieldsAtts = array();
-		$aMandatoryAtts = array();
-		$aReadonlyAtts = array();
-		$aHiddenAtts = array();
+		$aFieldsExtraData = array();
 
 		if ($this->oForm !== null)
 		{
@@ -387,6 +385,12 @@ class ObjectFormManager extends FormManager
 					$oFieldNode->setAttribute('data-form-path', $oForm->GetId());
 				}
 
+				// Checking if field should be displayed opened (For linked set)
+                if($oFieldNode->hasAttribute('data-field-opened') && ($oFieldNode->getAttribute('data-field-opened') === 'true') )
+                {
+                    $aFieldsExtraData[$sFieldId]['opened'] = true;
+                }
+
 				// Settings field flags from the data-field-flags attribute
 				foreach (explode(' ', $sFieldFlags) as $sFieldFlag)
 				{
@@ -606,9 +610,9 @@ class ObjectFormManager extends FormManager
 
 				// Specific operation on field
 				// - LinkedSet
-				//   - Overriding attributes to display
 				if (in_array(get_class($oField), array('Combodo\\iTop\\Form\\Field\\LinkedSetField')))
 				{
+                    //   - Overriding attributes to display
 					if ($this->oApp !== null)
 					{
 						// Note : This snippet is inspired from AttributeLinkedSet::MakeFormField()
@@ -628,6 +632,11 @@ class ObjectFormManager extends FormManager
 						}
 						$oField->SetAttributesToDisplay($aAttributesToDisplay);
 					}
+					//    - Displaying as opened
+                    if(array_key_exists($sAttCode, $aFieldsExtraData) && array_key_exists('opened', $aFieldsExtraData[$sAttCode]))
+                    {
+                        $oField->SetDisplayOpened(true);
+                    }
 				}
 
 				$oForm->AddField($oField);
diff --git a/sources/form/field/linkedsetfield.class.inc.php b/sources/form/field/linkedsetfield.class.inc.php
index ed49aa72c..f04846bff 100644
--- a/sources/form/field/linkedsetfield.class.inc.php
+++ b/sources/form/field/linkedsetfield.class.inc.php
@@ -28,9 +28,13 @@ use \Combodo\iTop\Form\Field\Field;
  */
 class LinkedSetField extends Field
 {
+    const DEFAULT_INDIRECT = false;
+    const DEFAULT_DISPLAY_OPENED = false;
+
 	protected $sTargetClass;
 	protected $sExtKeyToRemote;
 	protected $bIndirect;
+    protected $bDisplayOpened;
 	protected $aAttributesToDisplay;
 	protected $sSearchEndpoint;
 	protected $sInformationEndpoint;
@@ -39,7 +43,8 @@ class LinkedSetField extends Field
 	{
 		$this->sTargetClass = null;
 		$this->sExtKeyToRemote = null;
-		$this->bIndirect = false;
+		$this->bIndirect = static::DEFAULT_INDIRECT;
+		$this->bDisplayOpened = static::DEFAULT_DISPLAY_OPENED;
 		$this->aAttributesToDisplay = array();
 		$this->sSearchEndpoint = null;
 		$this->sInformationEndpoint = null;
@@ -107,6 +112,28 @@ class LinkedSetField extends Field
 		return $this;
 	}
 
+    /**
+     * Returns if the field should be displayed opened on initialization
+     *
+     * @return boolean
+     */
+	public function GetDisplayOpened()
+    {
+        return $this->bDisplayOpened;
+    }
+
+    /**
+     * Sets if the field should be displayed opened on initialization
+     *
+     * @param $bDisplayOpened
+     * @return \Combodo\iTop\Form\Field\LinkedSetField
+     */
+    public function SetDisplayOpened($bDisplayOpened)
+    {
+        $this->bDisplayOpened = $bDisplayOpened;
+        return $this;
+    }
+
 	/**
 	 * Returns a hash array of attributes to be displayed in the linkedset in the form $sAttCode => $sAttLabel
 	 *
diff --git a/sources/renderer/bootstrap/fieldrenderer/bslinkedsetfieldrenderer.class.inc.php b/sources/renderer/bootstrap/fieldrenderer/bslinkedsetfieldrenderer.class.inc.php
index aaf395b28..ac8f2b376 100644
--- a/sources/renderer/bootstrap/fieldrenderer/bslinkedsetfieldrenderer.class.inc.php
+++ b/sources/renderer/bootstrap/fieldrenderer/bslinkedsetfieldrenderer.class.inc.php
@@ -46,7 +46,7 @@ class BsLinkedSetFieldRenderer extends FieldRenderer
 	 */
 	public function Render()
 	{
-		$oOutput = new RenderingOutput();
+	    $oOutput = new RenderingOutput();
 		$sFieldMandatoryClass = ($this->oField->GetMandatory()) ? 'form_mandatory' : '';
 		// Vars to build the table
 		$sAttributesToDisplayAsJson = json_encode($this->oField->GetAttributesToDisplay());
@@ -61,18 +61,35 @@ class BsLinkedSetFieldRenderer extends FieldRenderer
 		{
 			// Rendering field
 			$sIsEditable = ($this->oField->GetReadOnly()) ? 'false' : 'true';
-			$sCollapseTogglerVisibleClass = 'glyphicon-menu-down';
-			$sCollapseTogglerHiddenClass = 'glyphicon-menu-down collapsed';
-			$sCollapseTogglerId = 'form_linkedset_toggler_' . $this->oField->GetGlobalId();
+			$sCollapseTogglerIconVisibleClass = 'glyphicon-menu-down';
+			$sCollapseTogglerIconHiddenClass = 'glyphicon-menu-down collapsed';
+			$sCollapseTogglerClass = 'form_linkedset_toggler';
+			$sCollapseTogglerId = $sCollapseTogglerClass . '_' . $this->oField->GetGlobalId();
 			$sFieldWrapperId = 'form_linkedset_wrapper_' . $this->oField->GetGlobalId();
+
+			// Preparing collapsed state
+            if($this->oField->GetDisplayOpened())
+            {
+                $sCollapseTogglerExpanded = 'true';
+                $sCollapseTogglerIconClass = $sCollapseTogglerIconVisibleClass;
+                $sCollapseJSInitState = 'true';
+            }
+            else
+            {
+                $sCollapseTogglerClass .= ' collapsed';
+                $sCollapseTogglerExpanded = 'false';
+                $sCollapseTogglerIconClass = $sCollapseTogglerIconHiddenClass;
+                $sCollapseJSInitState = 'false';
+            }
+
 			$oOutput->AddHtml('<div class="form-group ' . $sFieldMandatoryClass . '">');
 			if ($this->oField->GetLabel() !== '')
 			{
 				$oOutput->AddHtml('<label for="' . $this->oField->GetGlobalId() . '" class="control-label">')
-					->AddHtml('<a id="' . $sCollapseTogglerId . '" class="form_linkedset_toggler" data-toggle="collapse" href="#' . $sFieldWrapperId . '" aria-expanded="false" aria-controls="' . $sFieldWrapperId . '">')
+					->AddHtml('<a id="' . $sCollapseTogglerId . '" class="' . $sCollapseTogglerClass . '" data-toggle="collapse" href="#' . $sFieldWrapperId . '" aria-expanded="' . $sCollapseTogglerExpanded . '" aria-controls="' . $sFieldWrapperId . '">')
 					->AddHtml($this->oField->GetLabel(), true)
 					->AddHtml('<span class="text">' . count($aItemIds) . '</span>')
-					->AddHtml('<span class="glyphicon ' . $sCollapseTogglerHiddenClass . '"></>')
+					->AddHtml('<span class="glyphicon ' . $sCollapseTogglerIconClass . '"></>')
 					->AddHtml('</a>')
 					->AddHtml('</label>');
 			}
@@ -109,8 +126,8 @@ EOF
 <<<EOF
 				// Collapse handlers
 				// - Collapsing by default to optimize form space
-				// It would be better to be able to construct the widget as collapsed, but in this ase, datatables thinks the container is very small and therefore renders the table as if it was in microbox.
-				$('#{$sFieldWrapperId}').collapse({toggle: false});
+				// It would be better to be able to construct the widget as collapsed, but in this case, datatables thinks the container is very small and therefore renders the table as if it was in microbox.
+				$('#{$sFieldWrapperId}').collapse({toggle: {$sCollapseJSInitState}});
 				// - Change toggle icon class
 				$('#{$sFieldWrapperId}').on('shown.bs.collapse', function(){
 					// Creating the table if null (first expand). If we create it on start, it will be displayed as if it was in a micro screen due to the div being "display: none;"
@@ -120,10 +137,10 @@ EOF
 					}
 				})
 				.on('show.bs.collapse', function(){
-					$('#{$sCollapseTogglerId} > span.glyphicon').removeClass('{$sCollapseTogglerHiddenClass}').addClass('{$sCollapseTogglerVisibleClass}');
+					$('#{$sCollapseTogglerId} > span.glyphicon').removeClass('{$sCollapseTogglerIconHiddenClass}').addClass('{$sCollapseTogglerIconVisibleClass}');
 				})
 				.on('hide.bs.collapse', function(){
-					$('#{$sCollapseTogglerId} > span.glyphicon').removeClass('{$sCollapseTogglerVisibleClass}').addClass('{$sCollapseTogglerHiddenClass}');
+					$('#{$sCollapseTogglerId} > span.glyphicon').removeClass('{$sCollapseTogglerIconVisibleClass}').addClass('{$sCollapseTogglerIconHiddenClass}');
 				});
 
 				// Places a loader in the empty datatables