Start horizontal and vertical screen problem

My application is a vertical screen to start, do not know why, prawn gets advice.
Reply:
Prawn gets advice
Reply:
Click the project name - a SupportedDevice Orientations "TARGETS down to select which screen anyway, try
Reply:

reference to the second floor kubeat reply:

click on the project name - "next TARGETS a SupportedDevice Orientations, to choose which screen anyway, try

Did not find this option ah, can cut a figure for me to see, thank you