diff --git a/CHANGELOG b/CHANGELOG
index d3839f05d8..877ed512ff 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,4 @@
+* Add keyword attribute to button tag
 * Allow field name on image tag
 * Remove unoconv and call soffice directly
 * Allow to include mixin to pool objects
diff --git a/doc/topics/views/index.rst b/doc/topics/views/index.rst
index fe9abfbcef..7c0d3edce8 100644
--- a/doc/topics/views/index.rst
+++ b/doc/topics/views/index.rst
@@ -365,6 +365,10 @@ Display a button.
 
     * ``help``: see in common-attributes-help_.
 
+    * ``keyword``: specify where will the button be displayed in the client
+      toolbar. The valid values are the keywords starting with `form_` from
+      topics-actions_ without the `form_` part.
+
 notebook
 ^^^^^^^^
 
diff --git a/trytond/ir/ui/form.rnc b/trytond/ir/ui/form.rnc
index a0c4a03e43..9151c60ca1 100644
--- a/trytond/ir/ui/form.rnc
+++ b/trytond/ir/ui/form.rnc
@@ -144,6 +144,9 @@ attlist.button &= attribute icon { text }?
 attlist.button &= attribute confirm { text }?
 attlist.button &= attribute name { text }
 attlist.button &= attribute states { text }?
+attlist.button &=
+    [ a:defaultValue="action" ]
+    attribute keyword { "relate" | "print" | "action" }?
 attlist.button &= [ a:defaultValue = "0" ] attribute rule { "0" | "1" }?
 attlist.button &= attribute change { text }?
 attlist.button &= attribute type { "class" | "instance" }?
diff --git a/trytond/ir/ui/form.rng b/trytond/ir/ui/form.rng
index 27d70d3407..87fb51e195 100644
--- a/trytond/ir/ui/form.rng
+++ b/trytond/ir/ui/form.rng
@@ -562,6 +562,17 @@
       <attribute name="states"/>
     </optional>
   </define>
+  <define name="attlist.button" combine="interleave">
+    <optional>
+      <attribute name="keyword" a:defaultValue="action">
+        <choice>
+          <value>relate</value>
+          <value>print</value>
+          <value>action</value>
+        </choice>
+      </attribute>
+    </optional>
+  </define>
   <define name="attlist.button" combine="interleave">
     <optional>
       <attribute name="rule" a:defaultValue="0">
diff --git a/trytond/ir/ui/tree.rnc b/trytond/ir/ui/tree.rnc
index 83cb2a1399..4b3ece8835 100644
--- a/trytond/ir/ui/tree.rnc
+++ b/trytond/ir/ui/tree.rnc
@@ -73,6 +73,9 @@ attlist.button &=
 attlist.button &= attribute confirm { text }?
 attlist.button &= attribute name { text }
 attlist.button &= attribute states { text }?
+attlist.button &=
+    [ a:defaultValue="action" ]
+    attribute keyword { "relate" | "print" | "action" }?
 attlist.button &= attribute change { text }?
 attlist.button &= attribute type { "class" | "instance" }?
 attlist.button &=
diff --git a/trytond/ir/ui/tree.rng b/trytond/ir/ui/tree.rng
index 1e800d19dd..028ffa820f 100644
--- a/trytond/ir/ui/tree.rng
+++ b/trytond/ir/ui/tree.rng
@@ -250,6 +250,17 @@
       <attribute name="states"/>
     </optional>
   </define>
+  <define name="attlist.button" combine="interleave">
+    <optional>
+      <attribute name="keyword" a:defaultValue="action">
+        <choice>
+          <value>relate</value>
+          <value>print</value>
+          <value>action</value>
+        </choice>
+      </attribute>
+    </optional>
+  </define>
   <define name="attlist.button" combine="interleave">
     <optional>
       <attribute name="change"/>