hello,
is there any option to sketch in rhino viewports like on the grasshopper canvas for live presentation purposes?
hope there is 
thx in advance…
chris
You can try the “_Sketch” command…
yeah i know… but it uses the cplanes which makes it useless in perspective view.
and you can t draw across viewports…
Surely there’s other on-screen drawing software you could use for that
Windows 10 has Windows Ink Screen Sketch built in.
https://www.google.com/amp/s/www.windowscentral.com/windows-ink-how-use-screen-sketch%3Famp
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you could make a macro to make the cplane parallel to the view and then run sketch.