Dragonframe 5.0.8: YES
Dragonframe 4.2.9: YES
Dragonframe 3.7.4: NO
Dragon Stop Motion 2.3.8: NO
(Dragonframe was previously called Dragon Stop Motion)
The Nikon D3400 provides a live view via its USB connection. The live view size is 640 x 424.
The Nikon live view does not have live view exposure simulation.
Dragonframe controls the Nikon D3400 ISO, shutter speed, aperture (with digital lens), image quality, and size.