Length constraint
=================
+Length constraint fixes length of lines such as standalone line or rectangle side.
-.. image:: images/Length.png
- :align: center
+To create Length constraint in the active Sketch:
+
+#. select in the Main Menu *Sketch - > Length* item or
+#. click **Length** button in Sketch toolbar:
+
+.. image:: images/length.png
+ :align: center
+
+.. centered::
+ **Length** button
+
+Property panel:
+
+.. image:: images/Length_panel.png
+ :align: center
+
+Input fields:
+
+- **Line** is the the line object selected in the view
+- **Value** is a line length, could be modified to set the desirable value
+- **Text location** is a position of the length value label relating to extension line (in the view)
+ .. image:: images/location_left.png
+ :align: left
+ **Left** inserts text at the left of the length extension line.
+
+ .. image:: images/location_automatic.png
+ :align: left
+ **Automatic** inserts text at the middle of the length extension line if it has enough length, otherwise - to the left.
+
+ .. image:: images/location_right.png
+ :align: left
+ **Right** inserts text to the right of the length extension line.
+
+When the line is selected length value is displayed in the property panel and in the view.
+
+When creating the constraint, after selection of a line at the first time:
+
+- drag the length presentation in the view to the desired position (by move mouse and click once)
+- set desirable length value in the input field in the view and press **Enter** or just press **Enter** to keep the current length
+
+.. image:: images/Length_field_view.png
+ :align: center
.. centered::
- Create a length constraint
+ Length input in the view
+
+**TUI Command**: *Sketch_1.setLength(LineObject, Value)*
+
+**Arguments**: line + length value
+
+Result
+""""""
+
+Created Length appears in the view.
+
+.. image:: images/Length_res.png
+ :align: center
+
+.. centered::
+ Length created
+
+**See Also** a sample TUI Script of a :ref:`tui_create_length` operation.
