I am reading this section of the ui module documentation.
The documentation says to create a "new ‘User Interface’ file in your library." What is meant by the "library" and how do I create a User Interface file in it? So far, I can only seem to access the UI designer from within creating a workflow. Also, the documentation later says that I can specify a function in the action section of the inspector for some ui elements. I do not see an action section, at least when creating a ui from within a workflow. Any clarification on that.

