Another area not fully documented is the power connection. Here is my take on the power connections that I've never seen stated in the following way:
You can power the display from two different places: the micro-USB port or the jumpers, just like you can power the RPi from either the micro-USB port or the jumpers. Therefore you have a number of combinations possible: If the display is being powered externally, you can power the RPi from the display's USB or the jumpers. If the RPi is being powered externally, you can power the display from the RPi's USB or the jumpers. Or you can power both externally. The official documents only show a couple of those combinations, but all are possible.
Am I incorrect in any of the above?