I have logged this under Feature Requests but maybe others have found a good way to do this already.
I often have to create sections in my architectural drawings to show construction. I set up a scene in SU to do that and then import the scene to Layout. All fine and dandy.
Now I want to home in on a small part of the section and show it at larger scale. Of course, I could create scenes in SU for every zoomed detail but that would create an unnecessarily large number of scenes. What I want to be able to do is to simply zoom in and enlarge the scale of a viewport. If you simply change the viewport scale, chances are you will have what looks like a blank space because it is not zooming et the point you choose but about some other arbitrary point (centre of scene?).
This is one situation where you might have wanted to open the viewport by double clicking into it, zoom in, and then relinking. Not sure double clicking is possible in LO2020.
The ideal way to do this would be to be able to select a centre around which any zoom occurs and then choose the new scale. Otherwise, you can be panning around endlessly trying to establish where you are.