diff --git a/CHANGELOG b/CHANGELOG
index 1c5638ce82..8f12ad3ff8 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,4 @@
+* Merge all kind of buttons
 * Use XML id for board action instead of id
 * Add states attribute to notebook
 * Allow to use tuple for Reference
diff --git a/doc/ref/models/models.rst b/doc/ref/models/models.rst
index 2a24c3a72d..72def97bd6 100644
--- a/doc/ref/models/models.rst
+++ b/doc/ref/models/models.rst
@@ -117,6 +117,11 @@ Static methods:
 
     Decorate button method to check group access.
 
+.. staticmethod:: ModelView.button_action(action)
+
+    Same as :stat:`ModelView.button` but return the action id of the XML `id`
+    action.
+
 Instance methods:
 
 .. method:: ModelView.fields_view_get([view_id[, view_type[, toolbar]]])
diff --git a/trytond/ir/module/module.xml b/trytond/ir/module/module.xml
index 2ec2b309c7..79ad2644df 100644
--- a/trytond/ir/module/module.xml
+++ b/trytond/ir/module/module.xml
@@ -18,18 +18,12 @@ this repository contains the full copyright notices and license terms. -->
                     <label name="state"/>
                     <field name="state" readonly="1"/>
                     <group col="2" colspan="2" id="button">
-                        <button string="Mark for Upgrade" name="upgrade"
-                            type="object"/>
-                        <button string="Mark for Uninstallation (beta)" name="uninstall"
-                            type="object"/>
-                        <button string="Mark for Installation" name="install"
-                            type="object"/>
-                        <button string="Cancel Installation" name="install_cancel"
-                            type="object"/>
-                        <button string="Cancel Upgrade" name="upgrade_cancel"
-                            type="object"/>
-                        <button string="Cancel Uninstallation" name="uninstall_cancel"
-                            type="object"/>
+                        <button string="Mark for Upgrade" name="upgrade"/>
+                        <button string="Mark for Uninstallation (beta)" name="uninstall"/>
+                        <button string="Mark for Installation" name="install"/>
+                        <button string="Cancel Installation" name="install_cancel"/>
+                        <button string="Cancel Upgrade" name="upgrade_cancel"/>
+                        <button string="Cancel Uninstallation" name="uninstall_cancel"/>
                     </group>
                 </form>
                 ]]>
@@ -45,14 +39,10 @@ this repository contains the full copyright notices and license terms. -->
                     <field name="name" expand="1"/>
                     <field name="version"/>
                     <field name="state"/>
-                    <button string="Mark for Upgrade" name="upgrade"
-                        type="object"/>
-                    <button string="Mark for Installation" name="install"
-                        type="object"/>
-                    <button string="Cancel Installation" name="install_cancel"
-                        type="object"/>
-                    <button string="Cancel Upgrade" name="upgrade_cancel"
-                        type="object"/>
+                    <button string="Mark for Upgrade" name="upgrade"/>
+                    <button string="Mark for Installation" name="install"/>
+                    <button string="Cancel Installation" name="install_cancel"/>
+                    <button string="Cancel Upgrade" name="upgrade_cancel"/>
                 </tree>
               ]]>
             </field>
diff --git a/trytond/ir/ui/form.rnc b/trytond/ir/ui/form.rnc
index d2860fd54c..ab52e0d308 100644
--- a/trytond/ir/ui/form.rnc
+++ b/trytond/ir/ui/form.rnc
@@ -137,12 +137,8 @@ attlist.button &= attribute help { text }?
 attlist.button &=
   [ a:defaultValue = "Unknown" ] attribute string { text }?
 attlist.button &= attribute icon { text }?
-attlist.button &=
-  [ a:defaultValue = "object" ]
-  attribute type { "object" | "action" }?
 attlist.button &= attribute confirm { text }?
 attlist.button &= attribute name { text }
-attlist.button &= attribute states { text }?
 notebook = element notebook { attlist.notebook, page* }
 attlist.notebook &= [ a:defaultValue = "4" ] attribute colspan { text }?
 attlist.notebook &= attribute states { text }?
diff --git a/trytond/ir/ui/form.rng b/trytond/ir/ui/form.rng
index a16208e7f9..107ac81407 100644
--- a/trytond/ir/ui/form.rng
+++ b/trytond/ir/ui/form.rng
@@ -530,16 +530,6 @@
       <attribute name="icon"/>
     </optional>
   </define>
-  <define name="attlist.button" combine="interleave">
-    <optional>
-      <attribute name="type" a:defaultValue="object">
-        <choice>
-          <value>object</value>
-          <value>action</value>
-        </choice>
-      </attribute>
-    </optional>
-  </define>
   <define name="attlist.button" combine="interleave">
     <optional>
       <attribute name="confirm"/>
@@ -548,11 +538,6 @@
   <define name="attlist.button" combine="interleave">
     <attribute name="name"/>
   </define>
-  <define name="attlist.button" combine="interleave">
-    <optional>
-      <attribute name="states"/>
-    </optional>
-  </define>
   <define name="notebook">
     <element name="notebook">
       <ref name="attlist.notebook"/>
diff --git a/trytond/ir/ui/tree.rnc b/trytond/ir/ui/tree.rnc
index 280fea1820..c52067b974 100644
--- a/trytond/ir/ui/tree.rnc
+++ b/trytond/ir/ui/tree.rnc
@@ -54,12 +54,8 @@ button = element button { attlist.button, empty }
 attlist.button &= attribute help { text }?
 attlist.button &=
   [ a:defaultValue = "Unknown" ] attribute string { text }?
-attlist.button &=
-  [ a:defaultValue = "object" ]
-  attribute type { "object" | "action" }?
 attlist.button &= attribute confirm { text }?
 attlist.button &= attribute name { text }
-attlist.button &= attribute states { text }?
 data = element data { attlist.data, xpath+ }
 attlist.data &= empty
 xpath = element xpath { attlist.xpath,
diff --git a/trytond/ir/ui/tree.rng b/trytond/ir/ui/tree.rng
index edd1727ed8..5ecd857845 100644
--- a/trytond/ir/ui/tree.rng
+++ b/trytond/ir/ui/tree.rng
@@ -163,16 +163,6 @@
       <attribute name="string" a:defaultValue="Unknown"/>
     </optional>
   </define>
-  <define name="attlist.button" combine="interleave">
-    <optional>
-      <attribute name="type" a:defaultValue="object">
-        <choice>
-          <value>object</value>
-          <value>action</value>
-        </choice>
-      </attribute>
-    </optional>
-  </define>
   <define name="attlist.button" combine="interleave">
     <optional>
       <attribute name="confirm"/>
@@ -181,11 +171,6 @@
   <define name="attlist.button" combine="interleave">
     <attribute name="name"/>
   </define>
-  <define name="attlist.button" combine="interleave">
-    <optional>
-      <attribute name="states"/>
-    </optional>
-  </define>
   <define name="data">
     <element name="data">
       <ref name="attlist.data"/>
diff --git a/trytond/ir/ui/view.py b/trytond/ir/ui/view.py
index e96bde4b67..7d84395ac0 100644
--- a/trytond/ir/ui/view.py
+++ b/trytond/ir/ui/view.py
@@ -50,6 +50,9 @@ class View(ModelSQL, ModelView):
             'invalid_xml': 'Invalid XML for View!',
         })
         self._order.insert(0, ('priority', 'ASC'))
+        self._buttons.update({
+                'show': {},
+                })
 
     def init(self, module_name):
         super(View, self).init(module_name)
@@ -70,6 +73,10 @@ class View(ModelSQL, ModelView):
     def default_module(self):
         return Transaction().context.get('module') or ''
 
+    @ModelView.button_action('ir.act_view_show')
+    def show(self, ids):
+        pass
+
     def check_xml(self, ids):
         "Check XML"
         pool = Pool()
diff --git a/trytond/ir/ui/view.xml b/trytond/ir/ui/view.xml
index 76814ed407..7097c74914 100644
--- a/trytond/ir/ui/view.xml
+++ b/trytond/ir/ui/view.xml
@@ -29,11 +29,7 @@ this repository contains the full copyright notices and license terms. -->
                     <field name="field_childs"/>
                     <separator name="arch" colspan="4"/>
                     <field name="arch" colspan="4"/>
-                    <button name="%(act_view_show)d"
-                        string="_Show"
-                        type="action"
-                        colspan="4"
-                        />
+                    <button name="show" string="_Show" colspan="4"/>
                 </form>
                 ]]>
             </field>
diff --git a/trytond/model/modelview.py b/trytond/model/modelview.py
index 6bacf83435..babf53184c 100644
--- a/trytond/model/modelview.py
+++ b/trytond/model/modelview.py
@@ -450,19 +450,17 @@ class ModelView(Model):
                     CONTEXT)))
 
         if element.tag == 'button':
-            if element.get('type', 'object') == 'object':
-                assert not element.get('states')
-                button_name = element.attrib['name']
-                if button_name in self._buttons:
-                    states = self._buttons[button_name]
-                else:
-                    states = {}
-                groups = set(user_obj.get_groups())
-                button_groups = button_obj.get_groups(self._name, button_name)
-                if button_groups and not groups & button_groups:
-                    states = states.copy()
-                    states['readonly'] = True
-                element.set('states', encoder.encode(states))
+            button_name = element.attrib['name']
+            if button_name in self._buttons:
+                states = self._buttons[button_name]
+            else:
+                states = {}
+            groups = set(user_obj.get_groups())
+            button_groups = button_obj.get_groups(self._name, button_name)
+            if button_groups and not groups & button_groups:
+                states = states.copy()
+                states['readonly'] = True
+            element.set('states', encoder.encode(states))
 
         # translate view
         if Transaction().language != 'en_US':
@@ -504,3 +502,23 @@ class ModelView(Model):
                         % (func.__name__, self._name))
             return func(self, *args, **kwargs)
         return wrapper
+
+    @staticmethod
+    def button_action(action):
+        def decorator(func):
+            func = ModelView.button(func)
+
+            @wraps(func)
+            def wrapper(*args, **kwargs):
+                pool = Pool()
+                model_data_obj = pool.get('ir.model.data')
+                action_obj = pool.get('ir.action')
+
+                func(*args, **kwargs)
+
+                module, fs_id = action.split('.')
+                action_id = action_obj.get_action_id(
+                    model_data_obj.get_id(module, fs_id))
+                return action_id
+            return wrapper
+        return decorator
diff --git a/trytond/res/request.xml b/trytond/res/request.xml
index 278ebb7edd..828a822905 100644
--- a/trytond/res/request.xml
+++ b/trytond/res/request.xml
@@ -51,16 +51,13 @@ this repository contains the full copyright notices and license terms. -->
                             <label name="trigger_date"/>
                             <field name="trigger_date"/>
                             <group col="2" colspan="2" id="buttons">
-                                <button name="send" string="Send"
-                                    type="object"/>
-                                <button name="reply" string="Reply"
-                                    type="object"/>
+                                <button name="send" string="Send"/>
+                                <button name="reply" string="Reply"/>
                             </group>
                             <label name="state"/>
                             <field name="state"/>
                             <group col="3" colspan="2" id="button">
-                                <button name="close" string="Close"
-                                    type="object"/>
+                                <button name="close" string="Close"/>
                             </group>
                         </page>
                         <page string="References" col="1" id="references">