Thanks Meter 28
Join Date: Dec 2013
I had the same issue, I wanted a short tap key to show recent apps, because I consider that to be the best way to switch between apps.
It's possible to do this by using the Xposed installer together with the G2 module.
(you can achieve what you want with the free version)
This lets you customize the navigation bar to great extent.
I have a 4 key navigation bar now with a short press key for recent apps and an extra menu key next to that.
However, you need root for that to work.