In firmware version 1.6.0, the ninth item in the red menu for viewfinder (or monitor) display simulation had three real-time simulation options: Exposure + Aperture, Exposure Only, and Exposure Only When Pressing the Depth-of-Field Button. In firmwar...
To be honest, I didn't notice any new features. Instead, I noticed that the viewfinder simulation no longer has the ability to simulate both exposure and aperture.