diff --git a/runbot_merge/models/pull_requests.py b/runbot_merge/models/pull_requests.py
index 0ceaaf56..94055443 100644
--- a/runbot_merge/models/pull_requests.py
+++ b/runbot_merge/models/pull_requests.py
@@ -1114,10 +1114,14 @@ class Stagings(models.Model):
 
             s.state = st
 
-    def cancel(self, reason, *args):
+    @api.multi
+    def cancel(self, reason=None, *args):
         if not self:
             return
 
+        if reason is None:
+            reason = "explicitly cancelled by %s"
+            args = [self.env.user.display_name]
         _logger.info("Cancelling staging %s: " + reason, self, *args)
         self.batch_ids.write({'active': False})
         self.write({
diff --git a/runbot_merge/views/mergebot.xml b/runbot_merge/views/mergebot.xml
index 7ada3aef..8a63cdc0 100644
--- a/runbot_merge/views/mergebot.xml
+++ b/runbot_merge/views/mergebot.xml
@@ -182,6 +182,37 @@
             </tree>
         </field>
     </record>
+    <record id="runbot_merge_form_stagings" model="ir.ui.view">
+        <field name="name">Stagings Form</field>
+        <field name="model">runbot_merge.stagings</field>
+        <field name="arch" type="xml">
+            <form>
+                <header>
+                    <button type="object" name="cancel" string="Cancel" class="oe_highlight"/>
+                </header>
+                <sheet>
+                    <group>
+                        <group>
+                            <field name="target"/>
+                            <field name="state"/>
+                            <field name="reason"/>
+                        </group>
+                        <group>
+                            <field name="staged_at"/>
+                            <field name="statuses"/>
+                        </group>
+                    </group>
+                    <group>
+                        <field name="batch_ids" colspan="4">
+                            <tree>
+                                <field name="prs"/>
+                            </tree>
+                        </field>
+                    </group>
+                </sheet>
+            </form>
+        </field>
+    </record>
 
     <record id="runbot_merge_action_fetches" model="ir.actions.act_window">
         <field name="name">PRs to fetch</field>