How to make these nodes not transparent?

How to make these nodes not transparent?
I forgot , which key I touched, and the nodes go to transparent, just like the image below.
How to make it go back?

you can check this The transparent idea and https://www.grasshopper3d.com/profiles/blogs/transparent-canvas-wormhole-to-rhino-viewport !

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Thanks a lot! Very nice file
And now I get a amazing effect like this
111223

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It is the Panda and Dragonfly plugin causing it. Just remove them to go back to normal.

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Thanks!
I post 2 thread in this forum, and get feed back so fast within one hour,
happy new year,to you all!

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