To add to documentation of Max's nodelist and documentation of macros:

In Max's nodelist dropdown menu, under Macros, the selections In and Out which apply to macros, are available if and only if a macro node is present in the nodeeditor canvas, and is currently highlighted.

- Brian

(The dropdown list is long, but it is nice to be able to scan down the list to find a desired node, without having to select multiple menus.)