To mirror a set of lines:

• create a line to be used as an axis for mirroring

• while the line is selected

  • from the Line menu select toggle construction

  • from the Constraints menu select toggle fixed

• construct the half profile

• from the Line menu select Mirror

• in the dialog box click on the axes tab

• on the drawing, click on the axis line to select it

• in the dialog box click on the line tab

• on the drawing, click on the profile line to select it OR

  • hold down the Shift key and select all the lines that are to be mirrored

• click the OK button to complete the mirroring operation