moving viewport origins

[bonus]

Viewports originate from design layers. Is it possible to lock the viewport to a specific object in the design layer, so that moving this object makes the viewport move along with it?

As it is, moving the object might make it dissapear from the viewport in the sheet layer and the crop needs editing to show the object again.

E.g. you have a viewport i larger scale of a garage next to a house. For any reason you move the garage to another location, or rotate it. If the viewport were locked, the garage sheet would still be the same.

Most probably this is possible...but how?

Also...is it possible to show/hide the viewport crop in the design layer somehow? Once the viewport is created, it only shows in the sheet layers. Editing the crop can sometimes be easier to do in the design layer, as you can see what's outside of it.