diff --git a/python/plugins/processing/core/GeoAlgorithm.py b/python/plugins/processing/core/GeoAlgorithm.py
index 0d1f879af5a..8852e4ad949 100755
--- a/python/plugins/processing/core/GeoAlgorithm.py
+++ b/python/plugins/processing/core/GeoAlgorithm.py
@@ -341,7 +341,3 @@ def executeAlgorithm(alg, parameters, context=None, feedback=None, model=None):
     return result, ok
     #self.convertUnsupportedFormats(context, feedback)
     #self.runPostExecutionScript(feedback)
-
-    def helpUrl(self):
-        return QgsHelp.helpUrl("processing_algs/{}/{}".format(
-            self.provider().id(), self.id())).toString()
diff --git a/python/plugins/processing/gui/AlgorithmDialogBase.py b/python/plugins/processing/gui/AlgorithmDialogBase.py
index 58d2373d58b..60ac761753c 100644
--- a/python/plugins/processing/gui/AlgorithmDialogBase.py
+++ b/python/plugins/processing/gui/AlgorithmDialogBase.py
@@ -38,7 +38,7 @@ from qgis.utils import iface
 from qgis.core import (QgsProject,
                        QgsProcessingFeedback,
                        QgsSettings)
-
+from qgis.gui import QgsHelp
 
 from processing.core.ProcessingConfig import ProcessingConfig
 
@@ -255,6 +255,10 @@ class AlgorithmDialogBase(BASE, WIDGET):
 
     def openHelp(self):
         algHelp = self.alg.helpUrl()
+        if not algHelp:
+            algHelp = QgsHelp.helpUrl("processing_algs/{}/{}".format(
+                self.alg.provider().id(), self.alg.id())).toString()
+
         if algHelp not in [None, ""]:
             webbrowser.open(algHelp)
 
diff --git a/python/plugins/processing/gui/HelpEditionDialog.py b/python/plugins/processing/gui/HelpEditionDialog.py
index f5cea76a22f..7704603bbc3 100644
--- a/python/plugins/processing/gui/HelpEditionDialog.py
+++ b/python/plugins/processing/gui/HelpEditionDialog.py
@@ -33,7 +33,8 @@ from qgis.PyQt import uic
 from qgis.PyQt.QtWidgets import QDialog, QTreeWidgetItem
 
 from qgis.core import (QgsMessageLog,
-                       QgsProcessingUtils)
+                       QgsProcessingUtils,
+                       QgsProcessingParameterDefinition)
 from processing.modeler.ModelerAlgorithm import ModelerAlgorithm
 
 pluginPath = os.path.split(os.path.dirname(__file__))[0]
@@ -90,7 +91,7 @@ class HelpEditionDialog(BASE, WIDGET):
             s += '<h3>' + param.description() + '</h3>\n'
             s += '<p>' + self.getDescription(param.name()) + '</p>\n'
         s += self.tr('<h2>Outputs</h2>\n')
-        for out in self.alg.outputs:
+        for out in self.alg.outputDefinitions():
             s += '<h3>' + out.description() + '</h3>\n'
             s += '<p>' + self.getDescription(out.name()) + '</p>\n'
         return s
@@ -101,11 +102,14 @@ class HelpEditionDialog(BASE, WIDGET):
         parametersItem = TreeDescriptionItem(self.tr('Input parameters'), None)
         self.tree.addTopLevelItem(parametersItem)
         for param in self.alg.parameterDefinitions():
+            if param.flags() & QgsProcessingParameterDefinition.FlagHidden or param.isDestination():
+                continue
+
             item = TreeDescriptionItem(param.description(), param.name())
             parametersItem.addChild(item)
         outputsItem = TreeDescriptionItem(self.tr('Outputs'), None)
         self.tree.addTopLevelItem(outputsItem)
-        for out in self.alg.outputs:
+        for out in self.alg.outputDefinitions():
             item = TreeDescriptionItem(out.description(), out.name())
             outputsItem.addChild(item)
         item = TreeDescriptionItem(self.tr('Algorithm created by'), self.ALG_CREATOR)
diff --git a/python/plugins/processing/modeler/ModelerDialog.py b/python/plugins/processing/modeler/ModelerDialog.py
index 5ba21a064f3..0f57ad7a704 100644
--- a/python/plugins/processing/modeler/ModelerDialog.py
+++ b/python/plugins/processing/modeler/ModelerDialog.py
@@ -512,6 +512,7 @@ class ModelerDialog(BASE, WIDGET):
                 if isinstance(pos, QPoint):
                     pos = QPointF(pos)
                 component = QgsProcessingModelAlgorithm.ModelParameter(dlg.param.name())
+                component.setDescription(dlg.param.name())
                 component.setPosition(pos)
                 self.model.addModelParameter(dlg.param, component)
                 self.repaintModel()
diff --git a/python/plugins/processing/modeler/ModelerGraphicItem.py b/python/plugins/processing/modeler/ModelerGraphicItem.py
index 2b822f86636..149e74d6c19 100644
--- a/python/plugins/processing/modeler/ModelerGraphicItem.py
+++ b/python/plugins/processing/modeler/ModelerGraphicItem.py
@@ -196,6 +196,7 @@ class ModelerGraphicItem(QGraphicsItem):
             if dlg.param is not None:
                 self.model.removeModelParameter(self.element.parameterName())
                 self.element.setParameterName(dlg.param.name())
+                self.element.setDescription(dlg.param.name())
                 self.model.addModelParameter(dlg.param, self.element)
                 self.text = dlg.param.description()
                 self.update()