If your nav buttons are too close together, I believe the default spacing isHey, @rudi282
I had this exact problem today, but I was able to "fix" it by doing the following command:
settings put secure sysui_nav_bar "space,space,space,back;home;recent,space,space,space"
This also keeps the "Device Dashboard" away, so it just looks like default Android.
Note: I actually swapped "recent" and "back" as I prefer to have the back button on the right hand side.
Hope this helps!
settings put secure sysui_nav_bar "space,back;home;recent,space"