There are the User-defined ridges and then there are the generated ridges which will create the triangulated surface of the Mesh. The former is always shown, the latter can be set to be not visible in the Floor Plan asn Section panel of the Mesh Settings Dialog (Ridge Selection field).
Then whatever is shown in the screen will be printed.
But it seems to me that it is not possible to hide also the User-defined ridges so that only the outline of the Mesh is shown.
You could set the Uncut LIne Pen to white but that would make white both User-defined ridges and the contour of the Mesh. So I don't have an idea of how you could hide them easily.
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