Nikon Z9 Mirrorless Camera - Manual (Page 224)

224 Recording HLG Video
View Assist
You may find that the preview in the shooting display during HLG
recording lacks contrast. Selecting [
ON ] for Custom Setting g8 [ View
assist ] simplifies colors for enhanced contrast.
• p will appear in the shooting display.
• Colors in the actual recorded footage are unaffected.
• Contrast is also enhanced when HLG footage is viewed on the camera.