Deleting commands for running function in editor

Version 2012b on Mac Snow Leopard 10.68.

I don't seem to be able to delete commands from the run icon for running a function in the editor. Documentation says to select a command, hit right click, then select edit or delete.

Regardless of whether I use ctrl+click, option+click, or command+click, all that happens is the command runs.

What am I doing wrong?

David

[Image Analyst]

Using a mac? ;-)