Hi Axel,

re:
> is there an option to make lines visible that are behind surfaces?

Yes, there's an option for that on the View palette on the side pane. Set the checkbox for View > "Display hidden lines":



You can also find it on the Options dialog under Options > View > "Display hidden lines" checkbox.

- Michael

Hi Michael,

thanks a lot for your straight reply. I could bet I had the lines visible before some time ago and suspected an issue with my graphic settings.

That's a relief.

Best regards,
Axel