How I can get Soft Nav keys on the Note 5 ?

I forgot the method to get Soft Nav keys on the Note 5 ? I am rooted on a ROM, is there an Xposed module for that ? Or some specific setting ?

I did download an app from the Play Store;
https://play.google.com/store/apps/d...tbuttons&hl=en

But I want to swap the back and recent keys, but that app doesn't allow that.