I apologise if I’m posting some old information, but for many years I have been trying to find a fix for unwanted zoom clipping and I think I found one and feel I must share it.
But I also found that, as I use SU for 3D printing I often have to re-scale (x1000) to get circles to work. This sometimes means that I get a mix of objects drawn at different original scales within the model. Some objects may be originally drawn in metres, some drawn in millimetres, then scaled to metres. - especially when importing components. So I found that after deleting all guides, exploding groups and creating components throughout, clicking [scale definition] on the context menu for each and every component resets the origin and scale and zoom clipping disappears!
This sorts it for me:
I hope it helps someone.