I want to be able to edit a variable that will be multi-line. I would like to trigger that edit from a menu command so that it shows something like the "Display Text" window, but that is not editable. Prompt for user input outputs everything on one line so is not really what I need.
How might I achieve this using built-in functionality? If not possible, I know I could create a custom HTML form for this, but was hoping for simple approach as far as possible.