[Kevin Sevcik]

If we're talking about actual AutoCAD and not inventor, this is a system variable. It should be enabled by default, but if not, type in DRAGMODE and set it to 2.

I believe that in AutoCAD and Inventor it's possible to try moving or dragging a figure that is so complex that it can't be redrawn fast enough to make this work. Especially if you're working on and older/slower computer.

Also, while I hardly ever use inventor anymore, there could be a setting in the options somewhere that controls just how transparent and object is when you drag it.