If you go to Settings -> Accessibility -> Show Navigation Bar you can change it.

Edited by User5210635156 at 2019-01-07 04:08
Hi Avandeven,
My question is after Show Navigation Bar activated, can you swap back and opened app button.
Back button on the right, opened app button on the left
thanks

Edited by cris3d3 at 2019-01-07 15:49

Visit this link https://www.xda-developers.com/customise-the-navigation-bar-android-oreo/ and follow the instructions.
If you are rooted, it's easier. Otherwise, you must give some permissions using ADB commands.

I just tested on my rooted M792H (Flyme 7.1.0.0G) and it's working, Back and Recents buttons can be mirrored.

Thank you very much for the answer.

Edited by User5210635156 at 2019-01-13 04:56
i just used this app and phone went black. i had to hard reset the phone. my phone has no root and i do not want to root it. any other idea?

Update:

same method but using code  worked by fatphatboy88


4th entry by  fatphatboy88

https://forum.xda-developers.com/pixel-xl/help/swap-recent-button-oreo-t3687721

thanks   fatphatboy88

Well, for me it worked flawlessly with the app I mentioned, no problems or bugs at all.

how did you root your device? I've tried rooting mine and it worked, but after a day or so it just doesn't give root access to anything, can u show me a full tutorial on how to do it? Please I really need root on this phone

Edited by cris3d3 at 2019-02-14 14:19
Well, it was a surprise for me also. About a month ago I've installed latest chinese ROM following a method posted on a russian forum. On that ROM, obtaining root is done the old way (just enter password again in Root Permission settings). Well, I did that and everything was ok. After a week or so I decided to come back to the latest Global ROM, 7.1.0.0G. I wondered what could happen if I apply again for root on their chinese webpage, mroot.flyme.cn and I was surprised to see there a new device in the devices list: it showed my phone name. So, I applied again for root and after a couple of days I tested root authorization in roottool.apk. There it was: the grey button turned blue, I touched it and it wrote something in chinese (the button disappeared). After this, I checked Root Permissions setting, I entered my flyme password and everything went like in Flyme 7.0.0.0G and bellow: the phone restarted and root was enabled.

I'm sorry for my bad English but I'm not a native English speaker.

I really don't know if a rule can be made of what happened on my phone regarding root but you are free to try.