Union
=====
+Union feature implements a Boolean operation for creation of a union of selected objects.
+
+To create a Union in the active part:
+
+#. select in the Main Menu *Features - > Union* item or
+#. click **Union** button in the toolbar
+
+.. image:: images/union_btn.png
+ :align: center
+
+.. centered::
+ **Union** button
+
+The following property panel will be opened:
.. image:: images/Union.png
:align: center
.. centered::
- Union definition
+ **Union operation**
+
+Here it is necessary to select some objects. Only faces with shared edges or solids with shared faces are allowed for selection.
+
+**Apply** button creates a union shape.
+
+**Cancel** button cancels the operation.
+
+**TUI Command**: *model.addUnion(Part_doc, objects)*
+
+**Arguments**: Part + list of objects.
+
+Result
+""""""
+
+The Result of the operation will be a shape which is a union of selected objects:
+
+.. image:: images/CreatedUnion.png
+ :align: center
+
+.. centered::
+ **Union created**
+
+**See Also** a sample TUI Script of :ref:`tui_create_union` operation.
