100% Preview in Prototype Mode
Very annoying that the Preview window is not at 100%.
As we haven’t seen a response to our question in three months, I’m marking it as inactive. Please do feel free to file it again if you still want this feature!
AdminCorey Lucier (Adobe) (Admin, Adobe) commented
Please elaborate. The preview window is in fact at 100% unless the entirety of the design doesn't fit on screen. For web-sized artboards I would recommend introducing a scroll viewport to your artboard that what the content will be at full fidelity and you can scroll to view the entire page - thus fitting on screen and not being scaled.