_code

Display a block of QL code -- Function
_code() displays the raw code of a value or property, pretty flexibly.
You can give it as "TEXT -> code" to display the TEXT -- however, note that the TEXT will be processed as normal in this case. If you want to show some raw code, unprocessed, do it as "code(TEXT)" instead.
You can give a property as a parameter -- "_code(PROP)" -- and it will display the value of the property on this Thing.
Or you can give a property on some other Thing -- "_code(THING.PROP)" -- to display the value of the property on that Thing.
If you have a parameter, and it doesn't work as either PROP or THING.PROP, then it will display the parameter literally.
The results are displayed in an inset block, in monospaced type, so that it looks "codish".
_code is, frankly, a bit persnickety at this point, and not always easy to use for complicated examples. It should be considered a work in progress.