Yes - i have the same problem - Walkera firmware has no ratio-switch - but make a "wide-screen" - i hope the F12E - developers will find the software-switch to make also a wide-screen for the ratio.
DEVO10 4in1 V5.0 DEVO F12E 4in1 V5
Align TREX 100 (3) Hubsan Q4
Walkera QRW100S Walkera QRX 350 Pro (FPV)
Walkera QRX 350 PREMIUM
DIY 100 mm Micro QUAD - HGLRCF4F5PRO with INAV