Using the OFX Overlay in FilmConvert Nitrate for DaVinci Resolve 

To make secondary color corrections in FilmConvert Nitrate, turn on the OpenFX Overlay controls by clicking the OpenFX toggle button under your Preview Monitor.
You can also turn this on by going to View, Viewer Overlay, Open FX Overlay through the menu bar.
This will turn on the Grain Curve, Film Response Curve, and Color Wheels in FilmConvert Nitrate.
To give yourself space, we recommend using the Enhanced Viewer Mode. Go to Workspace, Viewer Mode, Enhanced Viewer, to switch to this view.