When running under 10fps for more than 30sec, UE4 offers to lower settings. What settings does it actually change?

Development Programming & Scripting
1

When UE4 been running under 10fps for more than 30sec, there’s a popup on the lower right that offers to lower settings. One of the button is Apply Now. If you pick that it runs an engine benchmark and changes some settings.

What settings does it actually change?

2

It changes the scalability settings, those that can be found under Settings – Engine Settings.