Embedding modeling functions in Human UI

Is there a simple way to call up Rhino commands with Human UI?
For instance: draw polyline. I know there is a “create rhino command” button, but I don’t know how to write these commands…
Any suggestions? would be cool if there was a dropdown menu in grasshopper where we can get all the functions directly embedded with the correct syntax for the button integration.

you can type in the command verbatim in the “script” parameter