Horizontal constraint
=====================
+
+Horizontal constraint fixes lines as parallel to the horizontal axis.
+
+To create a Horizontal constraint in the active Sketch:
+
+#. select in the Main Menu *Sketch - > Horizontal* item or
+#. click **Horizontal** button in Sketch toolbar:
+
+.. image:: images/horisontal.png
+ :align: center
+
+.. centered::
+ **Horizontal** button
+
+Property panel:
+
+.. image:: images/Horizontal_panel.png
+ :align: center
+
+Input fields:
+
+- **Line** is the line selected in the view.
+
+| After the line is selected it becomes parallel to the horizontal axis in the view.
+| **H** sign is added above the line.
+
+**TUI Command**: *Sketch_1.setHorizontal(LineObject)*
+
+**Arguments**: 1 line object
+
+Result
+""""""
+
+Created Horizontal constraint appears in the view.
+
+.. image:: images/Horizontal_res.png
+ :align: center
+
+.. centered::
+ Horizontal constraint created
+
+**See Also** a sample TUI Script of :ref:`tui_create_horizontal` operation.
\ No newline at end of file
