Sony FX 6 Quick Start Manual page 106

Cine EI: Turning on a LUT in the viewfinder
Go to status page 5 to turn on the LUT for the viewfinder and the SDI and HDMI outputs.
Always turn on the LUT for the SDI/HDMI outputs when you are using the LUT in the
viewfinder (even if you are not using an external monitor or recorder). MLUT means the
selected LUT is turned ON. Make sure Gamma Disp. Assist is OFF.
You can also choose
the LUT here.
LUT on outputs
LUT on viewfinder
This should be OFF