On Mac, copy into the following folder:
/Library/Application Support/Blackmagic Design/DaVinci Resolve/Fusion/Templates/Edit/GeneratorsOn Windows, copy into the following folder:
C:\ProgramData\Blackmagic Design\DaVinci Resolve\Fusion\Templates\Edot\GeneratorsFind the tool in your Effects tab.
This tool is designed to with Resolve Colour Management. Ensure your display output is set to one of the following: Rec2100 ST2084 / Rec2020 ST1084 1000 nit / P3-D65 ST2084 1000 nit
Drag it into the timeline and place it on a track above the footage you would like to analyse.
Please note: This tool has only been tested with a Resolve Colour Managed workflow.