How select only visible triangles?

I would like to use the Lasso tool to select only the visible triangles, but by default the selection goes trhough the whole model also selecting the triangles on the other side of the model. Any hint? Thank you

Hi Josef,
unfortunately there is no such option to select only visible triangle.
But what you can try is to use the Clipping Box tool (SCENE 3D/VIEW/View Tools) to show only wanted part of the model, where you will be able to select the triangle only from that showed part of the model.
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