Model native mass in Revit - Modelar masa nativa en revit

[2018018569ZU7FK]

Good afternoon, I’m trying to create native masses in Revit, but I haven’t been able to yet. What I’ve been able to create are dead masses that can’t clip other families, which are useless to me. I’ve attached a photo of what I’m getting. In the image, it’s selected and doesn’t have its grips. I want it with grips, like a native, in-place modeled mass. Thank you.