But... here's something you might try...
Go to a 3D View, and view the model from the top. Set your model graphics
style to Wireframe. Select the entire model (or half-model as in this case)
with a window or crossing selection box and mirror it.
I'd save a backup before doing this, of course, and make sure you've got
EVERYTHING turned on in the 3D view using Visibility/Graphics Overrides.
Realize also, that you'll only be editing model geometry and not annotation,
and that you may experience some strange results with some specific items
that you'll need to fix later.
"Matt Dillon" wrote in message
news:6356220@discussion.autodesk.com...
>
>
> I hate to sound like , but that ain't a good idea in Revit.
> While a valid technique in any CAD program, Revit isn't CAD and shouldn't
> be approached that way. Approach the modeling of a building in Revit
> somewhat the way you might approach modeling it with real-world materials.
>
> Now, somebody please shoot me. Or failing that, give me an icepick so I
> can
> give myself a lobotomy...
>
> "mrdavie" wrote in message news:6356164@discussion.autodesk.com...
>> I have a two story building. It is symmetrical about the midpoint so I
>> have been developing only half of the building. Now I want to mirror the
>> first half but I need to grab everything from the ground to the roof. Any
>> suggestions?