Rotate Screen for Signage

#1
I'm new for Minix or even Android environment, but I'm here to look for a solution for an android box which can rotate screen vertically in menu function. Today, I just got a brand new U9-H model but I found the rotate screen is quite weird (Under the menu there are 3 option: " Middle Port" "Force Land" "Original") I finally can't make it rotate vertically.

Anyway, is there any firmware that I can flash and enable the rotate screen feature? Is there any other budget Android or Minix box that has rotate screen feature built-in?
 
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