I find myself wondering many times why there is no possibility to zoom into the object preview window, curtain wall schedule preview or handrail preview tool. It feels like another gimmick that lost track after its inception. Maybe pimping it up just a tad would turn it into something useful...
Wouldn't it be great if you could actually preview what you are doing in that preview window?
Object preview:

Handrail Preview:

Curtain wall:
