Snap to a curve a percentage from the end

I’ve read about this snap mode on the Rhino help but i cannot get it to work, how is it performed?

Hi DarzVader - select the curve to work on at the end that you would like to measure the % from. Type in the % that you would like to use (currently, here, this seems always to default to an arbitrary number- might be a bug there) . Now you should see marker points appear on the curve at this % from the end- if you used 25% you would see three markers, dividing the curve into 4 spans. Do you see that?

It looks to me like there are a couple of tuneups needed on this- for example on closed curves the seam point should be indicated somehow.


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Thank you very much for your reply Pascal. I’m trying it and finally understand. Thanks again.