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How can I make the raspbian desktop look like I am viewing in front of a mirror? (basically backwards) I've already looked in the documentation for config.txt (here is a link) and tried to use rotate, but it seems that it rotates the hdmi, not the actual desktop. (but I don't know, because I use RDP) Can somebody please help me figure this out?

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  • Only time I’ve seen this done (for a back projector) was in the display driver. A quick check in the x11 manual shows rotation and not flip.
    – user115418
    Jun 29, 2020 at 21:31

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The option you are looking for is

display_hdmi_rotate

in https://www.raspberrypi.org/documentation/configuration/config-txt/video.md:

value 0x10000 should perform a horizontal flip, 0x20000 a vertical one.

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  • By the name, that rotates hdmi. I've tried that and it dint work.
    – Bob Joe
    Jun 30, 2020 at 23:21
  • If you use a gpio screen, you'll need to see if the manufacturer driver allows flipping. For instance, mine don't. Also, I don't think RDP has flipping setting (portrait seems to be ok, but no flip). Do you need all desktop or only your app to be flipped ? If only your app, it could be easier to flip what you show.
    – tqhien
    Jul 1, 2020 at 7:18
  • Desktop, and I dont need RDP to be flipped.
    – Bob Joe
    Jul 2, 2020 at 1:49

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