Problem when zooming in "Profile Location Editor"

[Dr. J Foerster]

The 3D visualisation also slows down with a large number of elements as all elements are shown (or known if outside the view box). But that should only be a problem way above 10.000 elements.

I received your project, on my computer I can not see a difference in behaviour if I zoom in to the end directly or first turn the model around.
One thing you can check is if the hardware acceleration is switched on (it should be by default). Please close all 3D visualisations and the soil wizard, then check/change the option "Use hardware acceleration" in the program options (menu "Tools - Options...", then tab "Advanced").