Amazon.com: DualShock 4 Back Button Attachment - PlayStation 4 : Video Games
How to Mod PS4 JDM-05 Controller Share & Option Buttons - YouTube
Amazon.com: DRILI Paddles for PS4 Controller, Back Button Attachment for PS4 Controller, Turbo Function/Memory Function/Plug and Play, PS4 Controller Accessories : Video Games
USB Adapter for DualShock 4 Switch 8BitDo
Controller button layout & customization - God of War Ragnarok | Shacknews
Cronus Zen PS4™ DUALSHOCK®4 Back Button – Collective Minds Store
How to Change Button Assignments in SONY PlayStation 4 – Switch Buttons - YouTube
I'm using a PlayStation controller but see hints for Xbox buttons (CG, Steam version only) – Spry Fox Support
How to Remap Buttons on Your PlayStation 4's Controller
How to remap PS4 Controller Buttons and Thumbsticks – Evil Controllers
How to Remap Your Gaming Controller's Buttons on Any Platform | Lifehacker
PS4 controller not working: Ways to troubleshoot & fix | Asurion