Snapping onto an object/point/curve while extruding via gumball

I wanted to adjust a polysurface and change its extrusion but it doesn’t let me snap on to an object or point while extruding. Is there any option to do this? It’s a novice question, I’ve just used Rhino today. I’ve uploaded a video in the hopes of explaining it further. Cheers.

Hi Michael -
Your video doesn’t play here but it sounds like you need to change the Gumball to “Snappy Dragging” mode:


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Hey there Wim,

Yeah, I figured the video didn’t play. Nevertheless, your answer is what I’m looking for. Works perfectly! Thank you so much for the response.


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