Flipping the display horizontally (mirroring display for projector)

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l2dohb7rmuc5.png669×532 452 KB

Does anyone know how to flip the display horizontally 180 degrees?
I’m projecting onto frosted glass from behind and i need to mirror the display so that text appears correctly, ect.

The projector i have doesn’t have the ability to do this by itself, so i was hoping i could find a way to tweak that code, if it’s not too complicated.

Thanks

2

Figured it out.

  1. put the SD card into a linux machine or mac
  2. open the config.txt file (in the ~500 mb partition)
  3. add this to the end of the file: display_rotate=0x10000

Here is a great reference for the config file:
elinux.org/RPiconfig