[Gmsh] Selecting multiple surface boundaries

[Clayton Hiles]

Hello GMSH Community,

I am attempting to use GMSH to create a unstructured 2D mesh for
oceanographic modelling.  I am following the tutorial here:
http://perso.uclouvain.be/jonathan.lambrechts/gmsh_ocean/

I encounter a problem when I attempt to add a 'plane surface' to my
geometry.  In the tutorial the plane surface is created by individually
selecting each boundary including all islands.  The problem is that my
geometry contains 1000+ islands and individually selecting each will take a
very long time.  I have attempted to use the lasso selector (CTRL + left
click), but this does not seem to work when selecting lines for a plane
surface.

So does anyone know a way of selecting multiple lines while defining a plane
surface?

Thanks very much,

Clayton Hiles
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