Saves an - easy, but still ;) - microflow, right? :)
(This post [https://forum.mendix.com/link/ideas/36] seemed to contain my idea as well, as well as several other (more advanced) show page ideas, although he might have been talking about microflow action activities, whereas I'm talking about a show page action button (on a page).)
If the button is placed in context, that context object is passed. Or do you mean something else?