Nikon Z8 Reference Manual page 16

3
Select a [Pixel shift shooting mode].
Highlight [Pixel shift shooting mode] and press 2.
Press 1 or 3 to select [On (series)] or [On (single photo)],
then press J.
- Image quality will be fixed at [RAW].
An icon will appear in the shooting display.
4
Choose the [Number of shots].
Highlight [Number of shots] and press 2.
Choose the number of shots using 1 or 3 and press J.
16
New Menu Item: "Pixel Shift Shooting"