Get Nikon Z at B&H Photo.
I wish Nikon would get out a dictionary and read up on optics, because “focus shift” is an absolutely terrible term to use for focus stepping and focus stacking.
I don’t really understand what this new peaking function does, but it sounds promising.
More convenient focus stacking — Focus shift photography
When shooting a scene containing various subjects at different focus distances, or creating specimen pictures of insects and flowers, photographers may want to bring everything into sharp focus. The Z 7’s focus shift photography function enables you to shoot sequences of up to 300 frames, while gradually and automatically shifting focus position from the start point to infinity. The shutter release interval and the focus step width can be selected.
Moreover, the Z 7 employs a new peaking stack image function that creates a monochrome preview image automatically to confirm*1 the areas in focus before combining the pictures*2 — making focus stacking more convenient than ever.
*1 Can be confirmed only with camera.
*2 Requires third-party application.