RetroArch in landscape on iPhone 6s?

Hello, I have the last version of RetroArch on iPhone 6s non-jailbroken (iOS 10.2) for psx games with pcsx-rearmed(interpreter) core. It works quite well belonging slowdowns, but the real problem is that the landscape orientation is inexistent! There is a button that should do it but it is always in portrait mode, it only changes the lenght of keys, the vision of screen and keys is always in portrait. How do I set landscape mode? Thank you for your work! :slight_smile: