A13: Focus Peaking; Focus Peaking Display; Focus Peaking Sensitivity; Focus Peaking Highlight Color - Nikon Z 8 Reference Manual

a13: Focus Peaking

G button U A Custom Settings menu
When focus peaking is enabled in manual focus mode, objects that are in focus are indicated by
colored outlines in the display. You can choose the color.

Focus Peaking Display

Select [ON] to enable focus peaking.

Focus Peaking Sensitivity

Choose focus peaking sensitivity from [3 (high sensitivity)], [2 (standard)], and [1 (low sensitivity)].
The higher the value, the greater the depth that will be shown as being in focus.

Focus Peaking Highlight Color

Choose the highlight color.
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a13: Focus Peaking