[Gmsh] Mirroring a Mesh of Triangles

[Patrick Wurm]

Hi,

I want to create a symmetrical 2D mesh using first order triangles (I 
need to use triangles for my purpose, no matter what).

Is it possible to mirror a mesh around a given axis?

I stumbled over the "Symmetry" command, but to my knowledge this is not 
applicable to elements but only to geometrical entities like points, 
lines, surfaces and so on.

Any help is greatly appreciated.
Thanks!

Patrick