Does anyone know how to show frames when triangulate

Hi, All.
I have this problem when use triangulate button. In tutorial, the frames can be displayed while in my own practice frames missing. Can someone help me to solve the problem? thanks very much

– my practice
image – it suppose to be

You need to show the mesh edges. You can do it by hitting ctrl+M on your keboard or under the display tab.

Hi, Baris.
Thanks! But it still can not work. I guess maybe it is from grasshopper, so rhino command can not be applied here.
Anyway, thanks for ur instant answer!

sorry, forgot to mentioned, it is in grasshopper

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Ah, thanks!