Child Action in Umbraco 6?

I'm working with version 6.1. My last experience with Umbraco is version 4 with webforms. So I'm very confused. I can't seem to find any documentation.

I saw a screenshot from V5 where you could choose a macro type (one choice was Child Action )

http://parwej.files.wordpress.com/2012/06/untitled.png

In V6 there is only MVC Partial View. But I want my controller called!

Can Macros not be used with child actions in V6?

Am I supposed to just do @Html.Action..... in my template or view? What about macro parameters then?