This geometrical operation allows to perform a symmetrical copy of your mesh or some of its elements.
To create a symmtrical copy of the mesh:
From the Modification menu choose Transformation -> Symmetry item or click "Symmetry" button in the toolbar.
Symmetry button
One of the following dialogs will appear:
It is possible to mirror a mesh or some of its elements through:
a point (defined by a point and a vector)
an axis
a plane (defined by a point and a normal to the plane)
In the dialog:
specify the IDs of the elements for the symmetry operation:
if the mesh is mirrored through an axis:
if the mesh is mirrored through a plane:
Click Apply or Apply and Close button to confirm the operation.
See Also a sample TUI Script of a Symmetry operation.