Symbols before the command

_Undo

!_Undo

'_Undo

How it works? What are the characters before the bottom underscore?

https://wiki.mcneel.com/rhino/basicmacros

1 Like

Quite enlightening entry there:

The tools you need

Your brain.

:slight_smile:

Also

https://docs.mcneel.com/rhino/6/help/en-us/index.htm#information/rhino_scripting.htm%3FTocPath%3DScripting%20and%20programming|_____1

-Pascal

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I think there are no questions, thank you very much for your help! :smiley: