Sony FX 6 Quick Start Manual page 79

Exposure: S-Cinetone Exposure
With the S-Cinetone gamma curve, contrast changes occur with
exposure: contrast increases in the shadows and decreases in the
highlights (starting at 70 IRE).
Underexposing will create an more contrasty image, and overexposing
will create a less contrasty, more subdued, image.
You can judge exposure simply by looking in the viewfinder. However, it
can be useful to use Zebra level settings, as I just illustrated, to help
determine exposure.
The next page offers some suggestions for exposure.