The Send Bitmap function in the simulator is very convenient for quickly testing what something looks like on the real device display. Even more convenient would be if there was a variant of it that would send a screenshot of the simulator to the device with one click, without having to save it as a file first. If that functionality already exists, I haven’t found it yet (Simulator 1.13.2 on macOS).
Or, even better, a way to continuously stream the simulator screen to the device display, kind of the opposite of what the Mirror application does.